August 8, 2026
Blended families are now a normal part of modern life. As an estate planning practitioner, I meet couples every week who sit down in my private office in South Anston and tell me they want a “straightforward will”. Usually, they say something like: “We just want everything split equally between the children.” On the surface, that sounds simple. Sensible. Fair.
But as the recent Court of Appeal case L (Adoption: Identification of Possible Father) shows, family life is rarely simple beneath the surface. Even when people believe their circumstances are clear, hidden complexities can emerge — and when they do, they can have profound consequences for inheritance, guardianship, and the future security of children.
This high‑profile case is not about wills directly. It concerns adoption, paternity, and the rights of children and parents. But the underlying theme is exactly the same challenge I see in estate planning every day: family structures are complicated, and failing to plan properly can create legal, emotional, and financial turmoil for the people you care about most.
In this article, I want to explore how this case highlights the risks of assuming your estate is “straightforward”, why blended families require careful planning, and why reviewing your will regularly is essential.
The Court of Appeal case involved a mother of three children. The judgment records:
“The background is that the appellant mother… has three children. The older two are B… and M… Their father is Mr C… The mother’s third child, K, is a baby girl…”
The mother initially told professionals that Mr C was the father of the baby, K. Later, she said he was not. She claimed the baby resulted from a one‑night encounter with an unidentified man. She feared Mr C’s reaction if he discovered the birth.
The court had to decide whether Mr C should be informed, whether DNA testing should be carried out, and whether “sibling testing” — testing the older children without Mr C’s knowledge — was appropriate.
“The judge was right to resist the proposal for sibling testing… it would… be a disproportionate interference with the rights of the other children and their father.”
The court emphasised the importance of clarity, identity, and the rights of all parties — including children who were not directly involved in the adoption proceedings.
This case illustrates a powerful truth: family relationships are interconnected, and decisions affecting one child or parent often ripple across the entire family.
You might wonder how an adoption case relates to wills. In fact, it highlights several issues that arise frequently when drafting wills for blended families.
1. Hidden or uncertain parentage can affect inheritance
In the case, the court noted:
“There was a substantial possibility that Mr C is K’s father…”
• Who is legally entitled to inherit
• Whether a child is recognised under intestacy rules
• Whether stepchildren or non‑biological children are included
• Whether excluded family members may challenge the will
I regularly meet clients who assume everyone knows who the children are, who the parents are, and who should inherit. But families are complicated. Relationships change. People separate, re‑partner, reconcile, or drift apart. Children may have different fathers or mothers. Some children may not be biologically related but are treated as part of the family.
If your will does not clearly define who you intend to benefit, the law may impose its own interpretation — and that interpretation may not match your wishes.
2. Blended families create competing rights and expectations
The judgment highlights how the rights of one parent can conflict with the wishes of another. The court said:
“The rights and interests of all parties must be considered and balanced.”
This is exactly the challenge in estate planning for blended families.
For example:
• A surviving spouse may expect to inherit the home
• Children from a previous relationship may expect their share
• Stepchildren may believe they should be treated equally
• Estranged children may reappear after death
• Former partners may still hold parental responsibility
3. Secrets, fears, and sensitive family history matter
In the case, the mother feared Mr C’s reaction. She concealed the pregnancy. She changed her account of paternity. The court noted:
“The factors speaking against informing Mr C… are not… strong enough to justify taking that course.”
In estate planning, clients often have similar concerns:
• Fear of upsetting a child
• Fear of conflict between siblings
• Fear of a former partner causing trouble
• Fear of revealing past relationships
• Fear of unequal treatment being judged harshly
These fears are real. They influence decisions. They shape how people want their estates distributed.
A good estate planner listens carefully, understands the emotional context, and drafts documents that protect the client’s wishes while minimising future conflict.
Many people believe their estate is simple because:
• They have a spouse
• They have children
• They own a home
• They want everything divided equally
But simplicity is rarely the reality.
Blended families complicate everything
• Children from previous relationships
• Stepchildren they treat as their own
• Estranged children
• Informal guardianship arrangements
• Uncertain paternity
• Different financial contributions to the home
• Former partners with parental responsibility
Equal shares are not always fair shares
Clients often say they want equal shares between children. But equal shares may not reflect:
• Different levels of need
• Disabilities or vulnerabilities
• Estrangement
• Lifetime gifts already made
• Stepchildren who rely on the parent
• Children who provide care
• Children who have no relationship with the parent
Intestacy rules do not understand modern families
If someone dies without a will, the law follows strict rules. These rules do not recognise:
• Stepchildren
• Informal arrangements
• Unmarried partners
• Blended families
• Wishes expressed verbally
• Promises made informally
Lessons from the Court Case for Estate Planning Clients
1. Clarity prevents conflict
The court insisted on establishing paternity clearly and definitively. In estate planning, clarity about beneficiaries, guardians, and intentions prevents disputes.
2. Secrets eventually surface
The mother tried to conceal the pregnancy and paternity. Ultimately, the truth had to be investigated. In estate planning, hidden relationships or unacknowledged children can emerge after death, leading to claims against the estate.
3. Children’s rights matter
The court emphasised the child’s right to know their identity. In estate planning, children have rights under the Inheritance (Provision for Family and Dependants) Act 1975. A will must be drafted with these rights in mind.
4. Professional guidance is essential
The case involved complex legal, ethical, and emotional issues. Estate planning is no different. DIY wills or unregulated will writers cannot provide the depth of expertise required for modern family structures.
At Matrix Estate Planning Ltd, I specialise in helping families across South Yorkshire and the wider UK navigate these challenges with clarity, compassion, and professionalism.
1. Detailed fact‑finding
I take the time to understand:
• Family structure
• Relationships
• Concerns
• Vulnerabilities
• Financial arrangements
• Property ownership
• Previous marriages
• Children from all relationships
2. Tailored solutions
I draft wills that:
• Protect spouses and partners
• Provide fairly for children
• Avoid accidental disinheritance
• Prevent claims
• Protect vulnerable beneficiaries
• Manage blended family expectations
• Use trusts where appropriate
• Provide clarity and certainty
3. Ethical, confidential advice
Just as the court had to balance privacy and rights, I help clients navigate sensitive issues with discretion and respect.
4. Long‑term support
• Relationships change
• Children grow up
• New children or grandchildren arrive
• Property is bought or sold
• Health changes
• Divorce or separation occurs
The case of L (Adoption: Identification of Possible Father) shows how quickly circumstances can change and how complex family dynamics can become. Even if your will was “straightforward” when drafted, it may no longer reflect your reality.
If you have:
• A blended family
• Stepchildren
• Estranged children
• Uncertain or sensitive family relationships
• A will more than three years old
• A will drafted without professional advice
• A will that simply says “equal shares”
Then now is the time to review it.
Your will is not just a legal document. It is a message to your family. It is your final act of care. It is your legacy.
I invite you to contact Matrix Estate Planning Ltd to arrange a confidential consultation. Whether you need a new will, a review of your existing will, or advice on trusts, guardianship, or inheritance tax, I am here to help.
Your family deserves clarity. Your wishes deserve protection. Your legacy deserves professional care.
Would you like more information?
