Why get married to them in the first place? To some extent, we need to take the risk of trusting one or two of our family members. Besides, all those wealths that you are indirectly making are supposed to be for the family, so what's the point of totally blacking them out?
Woah there, we are getting too meta.
I'm pretty sure I have no problems trusting myself either, he's talking about immediate family who you can't choose who you get. I wouldn't be leaving any seeds for my own folks either at this rate - they'd just squander it.