Actually it depends.
For example, I will worry a lot to leave my inheritance to my wife. She’s not very independent and know nothing about financial stuff. Don’t even know how to pay bills etc.
If leave her with money, scare she kena scammed or wasteful. Worse is she don’t work and spend money carelessly. After few years, maybe before the kids grow up and start working, the money would be gone.
So, if parents still young and healthy, and financially prudent/savvy, I may consider leaving my inheritance to them with explicit instructions for the money to be used on the kids.
But of course, having to work 2 jobs is too extreme. So, need more details before I can come to a better conclusion. But, based on what I said previously, and with the presumptions I made regarding the wife, I can sort of understand why he left the inheritance with his mum. And it has nothing to do with being a mummy’s boy, but a lack of confidence with the wife’s ability to be independent and handle money.