also another idea is to stop fully killing off the heros
make them become broken which means mentally their incapable of doing things themselfs
if you save them and drag them to somewhere excluded like a bush or somewhere they aint getting touched anymore you could add two new abilitys
breed to stablise which would be the sucubus ability she temp turns into a futa and calmly and gently breeds the broken girl back to life
the 2nd is for any none demonic girls and thats plessure to life
basicly the lesbian version of breed to life