Planning for the inheritance of assets in blended families can be complex, especially when ensuring equal provision for both biological children and stepchildren after the death of one parent. Standard mirror wills, where a couple leave their assets to each other, may not provide the certainty needed to guarantee inheritances for all intended beneficiaries, according to legal experts.

Many couples with mirror wills assume their assets will eventually pass to their chosen beneficiaries. However, once assets pass outright to a surviving spouse, they gain full ownership. This means the surviving spouse is free to alter their will, make lifetime gifts, or otherwise restructure their affairs, potentially disinheriting the children from the first spouse's previous relationship.

To address this, legal professionals often recommend establishing trusts within wills to provide greater certainty and protection for beneficiaries. One common option is a life interest trust. This arrangement allows the surviving spouse to benefit from assets, such as continuing to live in the family home, for the rest of their life. Crucially, the underlying capital is preserved and designated to pass to specific beneficiaries, such as the deceased's son and stepson, upon the surviving spouse's death.

Alternatively, investments can be placed in a life interest trust, enabling the surviving spouse to receive any income generated without owning the capital outright. This approach aims to balance the need for the surviving spouse's financial security with the protection of an inheritance for children and stepchildren.

Another strategy for blended families is a discretionary trust. This type of trust offers flexibility to trustees, who can decide how and when funds are distributed among a group of beneficiaries. This group might include the surviving spouse, children, stepchildren, and even future grandchildren. Such flexibility is particularly valuable as family circumstances change over time, allowing trustees to account for differing needs, such as one child facing financial hardship or health issues.

Discretionary trusts can also offer asset protection, keeping wealth within the trust and safeguarding it from potential risks like financial mismanagement or creditor claims. Selecting the right trustees is paramount for any trust-based will. These individuals will be responsible for making significant decisions long after the testator's death and must be trusted to act fairly and balance the interests of all parties involved. Some families opt for a combination of family members and a professional trustee to provide both personal insight and independent oversight.

Additionally, a letter of wishes can accompany a will. While not legally binding, it provides guidance to trustees on how decisions should be made as family circumstances evolve. Ultimately, if ensuring equal provision for both sons is a priority, relying solely on mirror wills may not offer the desired certainty. Seeking legal advice on a trust-based will can help protect wishes while ensuring financial security for the surviving spouse.