Building a Secure Future: Why ‘Legal Consideration’ is Crucial for Blended Families in Australia
Bringing two families together is one of life’s most profound and rewarding experiences. A blended family is a tapestry woven with new relationships, shared hopes, and the promise of a vibrant future. But as anyone living in a stepfamily or blended family knows, the reality is far more complex than a sitcom plot. Alongside the […]

Building a Secure Future: Why ‘Legal Consideration’ is Crucial for Blended Families in Australia
Bringing two families together is one of life’s most profound and rewarding experiences. A blended family is a tapestry woven with new relationships, shared hopes, and the promise of a vibrant future. But as anyone living in a stepfamily or blended family knows, the reality is far more complex than a sitcom plot. Alongside the joy and new connections come unique emotional, financial, and legal puzzles.
How do you navigate parenting styles? Who is responsible for what financially? And most importantly, how do you protect the interests of everyone involved—your new partner, your children, and your stepchildren?
In Australia, the answer lies in building a strong legal foundation. At the very heart of this foundation is a crucial, yet often misunderstood, legal principle: legal consideration.
At Aylward Game Solicitors, we believe in empowering our clients with clarity and confidence. With nearly 50 years of collective experience, our Brisbane, Gold Coast, and Sunshine Coast lawyers are committed to helping families navigate these complexities. In this guide, our Accredited Specialist Family Lawyer, Ian Field, will break down the critical legal framework for blended families and explain why understanding what is legal consideration in a contract is the key to creating a secure and harmonious future for your new family.

What is a Blended Family in the Eyes of Australian Law?
First, let’s establish what we’re talking about. In Australia, a blended family (or stepfamily) is a family unit where at least one partner has children from a previous relationship. These family structures are incredibly common. The Australian Bureau of Statistics shows that over 12% of couple families with dependent children now fall into this category.
While these families are built on love and commitment, the Family Law Act 1975 and other legislation have specific rules that apply to them. These laws recognise that the rights and responsibilities of biological parents, stepparents, children, and stepchildren require careful definition to prevent future conflict.
The Cornerstone of All Agreements: What is Legal Consideration in a Contract?
Before we delve into the specific agreements your blended family needs, we must first grasp the single most important element that makes any agreement legally binding: legal consideration. Without it, a promise is just a promise. With it, a promise becomes an enforceable contract.
At its core, legal consideration is the legal term for the value that each party brings to the table. It is the concept of quid pro quo—literally, “something for something.”
Imagine a simple scenario: your friend promises to give you their car. If they change their mind, you can’t force them to hand over the keys. This was a promise to make a gift, as you did not provide anything of value in return.

Now, let’s change one detail: your friend promises to sell you their car for $4,000, and you agree. A legally binding contract has been formed.
- Their consideration: The promise to transfer ownership of the car.
- Your consideration: The promise to pay the $4,000.
This mutual exchange of value is the legal consideration that transforms a casual chat into a consideration legal contract.
Key Principles of Legal Consideration
Australian courts have established several rules about what constitutes valid legal consideration:
- Consideration Must Be “Sufficient,” Not Necessarily “Adequate”: This means the “price” of the promise must have some value in the eyes of the law, but it doesn’t have to be a fair market price. Selling a house worth $400,000 for $200,000 is a bad deal, but the $200,000 is still legally “sufficient” consideration. The court’s job is not to save you from a bad bargain, but to determine if a bargain was made at all.
- Past Consideration is No Consideration: An act already performed before a promise is made cannot be used as consideration for that new promise. If you helped a friend last month and they promise to pay you for it today, that promise is generally unenforceable because your help was “past consideration.”
- Performing an Existing Duty is Not Good Consideration: If you are already obligated to do something, promising to do that same thing is not valid consideration for a new contract.
Understanding this concept is vital because the critical documents that will protect your blended family—such as Binding Financial Agreements and Wills—are all contracts. Their validity hinges on the proper establishment of legal contract consideration.
Applying Legal Consideration: Essential Agreements for Your Blended Family

“In my experience, the most successful blended families are those who are proactive, not reactive,” explains Ian Field, an Accredited Specialist in Family Law at Aylward Game. “They have the tough conversations early and formalise their intentions with legally sound agreements. This isn’t about a lack of trust; it’s about creating clarity and showing respect for everyone’s future.”
Here are the key areas where legal consideration is paramount for your blended family.
1. Binding Financial Agreements (BFAs): Your Financial Blueprint
A Binding Financial Agreement (BFA), often known as a “prenup” or a separation agreement, is a private contract that dictates how your assets, liabilities, and financial resources will be divided if your relationship breaks down. For blended families, a BFA is arguably the most powerful tool available.

The Role of Legal Consideration in a BFA: The legal consideration in a BFA is profound and clear. Each party gives up something of immense value: the right to ask the Family Court to decide their property settlement and/or spousal maintenance claims.
- Party A’s Consideration: Agrees to the terms of the BFA and forgoes their right to litigate for a different outcome.
- Party B’s Consideration: Agrees to the terms of the BFA and forgoes their right to litigate for a different outcome.
In exchange for giving up this right, both parties gain certainty, finality, and control over their financial future. This mutual exchange is the legal contract consideration that makes the BFA enforceable. Without this, or if one party was pressured or didn’t receive independent legal advice, a court could set the agreement aside. This is why having an expert guide you through its creation is non-negotiable.
2. Wills and Estate Planning: Protecting Everyone’s Inheritance
One of the biggest sources of conflict in blended families is inheritance. What happens when you pass away? Does everything go to your new spouse, potentially disinheriting the children from your first relationship?
If you die without a valid and updated Will, the laws of intestacy will determine who gets what, and the result may not reflect your wishes at all. Stepchildren have no automatic entitlement under these rules.
The Role of Legal Consideration in Estate Planning: While a Will itself isn’t a contract in the same way as a BFA, the planning process involves agreements that rely on similar principles. For example, a couple might make “mutual Wills,” where they agree on a shared plan for distributing their assets to all children after both have passed away. The legal consideration here is the mutual promise to stick to the agreed-upon plan and not secretly change the Will later.
A carefully drafted Will ensures:
- Clarity: It clearly names all beneficiaries (spouse, biological children, and stepchildren) and specifies their inheritance.
- Protection: You can create testamentary trusts to provide for your spouse during their lifetime while ensuring the ultimate inheritance passes to your children.
- Minimised Conflict: A clear plan reduces the likelihood of expensive and emotionally draining legal challenges to your estate.
Ian Field, who is also experienced in Wills & Estates, notes, “A significant change in your personal relationships, like re-partnering, demands a review of your estate plan. It’s a crucial step to ensure fairness and prevent devastating disputes between the people you love.”

3. Stepparent Rights, Parenting Orders, and Child Support
Navigating the day-to-day responsibilities for children in a blended family can be tricky. It’s essential to understand the legal landscape:
- Stepparents have no automatic parental responsibility. Unlike a biological parent, a stepparent cannot automatically authorise medical treatment or make major decisions about a child’s education or religious upbringing.
- Parenting Orders can grant responsibility. A stepparent can apply to the court for parenting orders, but they must convince the court that it is in the child’s best interests.
- Child Support can be affected. If you have a child in your new relationship, it can impact the amount of child support you pay for children from a previous one, as you now have another dependent to support.
Formalising arrangements through Consent Orders or a Parenting Plan provides certainty for everyone. The legal consideration in these agreements is the mutual promise to abide by the agreed-upon terms, providing stability for the children and legal finality for the adults.

Navigating the Legal and Ethical Considerations in Mackay
A properly drafted agreement requires more than just technical accuracy; it demands a deep understanding of the legal and ethical considerations involved. This is a cornerstone of our practice at Aylward Game Solicitors.
The legal requirement is to establish valid legal consideration. The ethical requirement is to ensure the agreement is entered into fairly, without pressure, and with full understanding from all parties.
“Our role extends beyond the black-and-white letter of the law,” says Ian. “We have an ethical duty to ensure our clients are making informed decisions of their own free will. This means facilitating a complete and frank exchange of financial information and explaining the long-term consequences of any agreement, ensuring you understand the rights you are giving up and the certainty you are gaining. That is what proper legal ethical considerations look like in practice.”
Ian’s sympathetic and practical approach, honed through decades of experience in both the UK and Australia, ensures clients feel heard and supported while making decisions that will shape their future.
Your Proactive Plan for a Strong Blended Family
While legal documents are essential, they are just one part of the puzzle. A thriving blended family is built on a foundation of respect, patience, and open communication.
- Plan Before You Blend: Before moving in together, have open conversations about finances, parenting roles, and household expectations.
- Create New Traditions: Actively build a new family identity with shared rituals, routines, and celebrations.
- Establish Clear Boundaries: Ensure all children understand the house rules and the role of each adult in the home.
- Communicate Respectfully: Foster an environment where everyone feels safe to express their feelings, including in your communications with ex-partners.
- Seek Professional Advice Early: Don’t wait for a crisis. Consulting with a family lawyer and a family counsellor can provide you with a roadmap for success.

Don’t Leave Your Family’s Future to Chance
The complexities of blended families are significant, but they are not insurmountable. By understanding the importance of foundational legal principles like legal consideration and by seeking expert guidance, you can build a robust legal framework that protects your assets, your children, and your peace of mind.
An improperly formed agreement can unravel when you need it most, leading to stress, uncertainty, and costly legal battles. Ensure your agreements are built on the solid foundation of correct legal consideration.
Protect your assets, your family, and your future. Contact the dedicated team at Aylward Game Solicitors for a confidential consultation. Ian Field and our team of experienced family lawyers in Brisbane, the Gold Coast, and the Sunshine Coast are here to provide down-to-earth, practical advice you can trust.
Call us today at 07 3236 0001 to find out how we can help you build a secure and happy future for your blended family.




SHARE THIS