I played more of this over the Week-End, and I confirm it's really sweet, but then I tend to like management and/or harems. Anyways ty for the nice game. ^^
Then I thought I could suggest a couple of things to make this even better.
I have no notion of what code this is using so maybe some are just not realistic features to implement...
As there alreay is a dom variable, It would be really nice to have more bdsm content with your sexual partners or wifes, bondages mainly, some way to dress them up too, like with the harnesses, maybe gags and cuffs and a few other toys.
I did buy a couple dildos but didn't find an option to use them so far.
Oh and ofc, said toys could totally include a slave too but I don't know that u wanna go that way.
About the "stick a finger in her ass" option, maybe that could be available in missionnary/cowgirl positions, when it's the most practical, while doggy-style could maybe propose some other options, like hold her arms behind her back, grab her by the hair, you get the idea.
Just my two cents ^^
Regards o/
Arok