I'm very, very not cool with the drunk rapist played for comedy. I guess it was excused due to prior consent, in an arc about an already non-consent fetish? Which sort of breaks with how the story approached consent in prior arcs, beyond the trap itself. If it actually happens I'll hate it.
Otherwise it's primo consensual non-con sexual assault unionization comedy. God this manga is weird (positive). Good for you slimes, good for you. If only you had the biology to recognize this grandma is violating the bipeds' ethics.