I’m gonna be honest, I’m not asking for a friend, I’m asking for myself. Our daughter (24) married this man (65) in September. She herself stated money was the main reason, and he knows it but it doesn’t bother him. Both my husband & I are having a very hard time getting used to the idea.
It’ll probably be a lot more than you were bargaining for, but it may be helpful to look into sugar daddy/baby and fin-dom (financial domination) relationships and how they work, as it sounds like this is likely the type of situation your daughter is in. I know that if I had kids, researching their kinks probably wouldn’t be the most comfortable thing in the world, but it may help you get a better understanding of the dynamics of their relationship. Generally speaking, these are pretty healthy relationships as long as both parties are fully onboard and consenting, which it sounds like is the case here.
Relationships like this are actually fairly common, but because of the stigmas surrounding them, people tend not to be super open about it. The fact that your daughter and son-in-law both seem to be on the same page and don’t mind letting you know about their arrangement, should probably be taken as a good sign.