Looking for a sister/mother for some shenanigans

[Rucio, Emperor of Cheese]

I've got four potential boys here, all of which I'd be open to having in an incestuous relationship, be it with their sister (older or younger) or with their mother. In the case of the younger brothers, I'd like it to be a situation where the first time is almost forced upon him, but he likes it so much that he gladly does it again in the future, maybe too eagerly. For the older brothers, I was thinking the exact opposite, where he is the one corrupting a younger sis/his mother.

 

Of course, just spitballing ideas here, if anyone likes any of them, send a message my way.