If that was the scenario it means you need to share the seed phrase with your child, because if you share with your wife or little brother/sister, it would be pointless because they're live in the same generation, they're likely to die earlier than our child, hence pass it to the next generation.
That is a consideration that I might be thinking about because if at any time that happens there are other options that can be done by our heirs. I also considered some other ideas such as storing the seed phrase in a much safer safe so that we can tell them at the right time. Honestly, all we want to do is the best for our children so that when we leave them they can access the bitcoins we have and they can use the assets for something much more productive.
It is unimaginable how after we die the assets cannot be accessed and maybe no one knows the seed phrase, so our struggle to invest will be quite in vain and I am sure this is not expected by any parent because they have been tired of struggling for nothing at a later time.