I am talking more about the out of the bed part. How much control over the family and their lives will he take? How much will he use his position of the breadwinner? How obvious will he be about, and will he stick it in Erwin's face? Generally, how absuive will he be? This kind of thing.
Sounds dope, honestly.
If you keep it mostly to "out of the bed" stuff, it will be limited to text only, and you can throw one extra "flavor" option on top of it. As in, normal sex scene same for all paths, but text is different and you have some additional little thing to show off the path, like in BDIK choking being DIK-restricted, and licking CHICK-restricted.
Lets say, on simping he can go down on the girls, and on super rough he can go into brutal anal - it's just two extra small animations for polar opposites, and if you go with "loving/bossy" only text changes. All other animations and renders remain the same. Not that much of a time investment, but it gives the flavour.
If it worked for BDIK, I don't see why it won't work here. The core system is the same, more or less.