I think inviting enemies to the base to hang out is a great idea! It would be an opportunity to write at least a few sex scenes that are more explicitly consensual for the mc. It'd probably too much work to do for every enemy, but it could definitely lead to some pretty cute scenes.
Especially if we had the option to invite a couple different enemies over when the mc gets them pregnant. Inviting them over to get pampered by their baby daddy could make for some super cute scenes!
I'd also like to second flora fauna, lots of ways to have good scenes involving plant enemies.