Some people can entrust such in the hand of their kids than even the mother, if that's what works for you, it's better they do it than let the Bitcoin never get any access while your family suffer later.
It isn't ideal if there isn't another way you'll have to share the seeds with someone while you're alive. If you've got a fortune you're taking a big risk because ppl can live with losing money. I don't know how ppl will respond to being by betrayed by loved ones.
Instead of trusting someone outside your family that is your first family before your extended family. It can be your wife your grown up kids. Now, these are the kind of situations why it is good to get married to someone who is morally sound to take security and ownership of all your belongings. If your partner dont understand what value means then forget there is nothing you will tell them when handling the keys to them they wont destroy what you worked for all through your life.
If you won't leave seeds in a will you'll have to trust your loved ones with access to your funds. It works for some ppl.