All I remember is that Daval was going to get rid of Uncle Peter like 3 issues ago and yet he's still here, I hope he doesn't fuck Sarah again, Aaron can fulfill his role instead.
Daval says a lot of things... my guess is that he tries to "wait out" the initial objection before trying again. In a way, he's holding his subscribers hostage: "keep paying me, or I'll put Uncle Peter back..." Though, that is entirely my assumption.
As far as Sarah and Uncle Peter hooking up again, I mean it's possible. I don't think he worries as much about alienating MT and SN fans as he does ID fans. But in my opinion, I think by the time Uncle Peter needs his penis washed, Aaron will intervene offering to do it himself (homosexual undertone) and this will make Uncle Peter so uncomfortable that he'll rush out of the bathroom. In actuality, Aaron would have manipulated them both by having a proverbial "Mexican standoff" calling Uncle Peter's bluff. I can see Aaron then pretending to slip and fall, soaking all of his clothes. His mother could then insist that he takes off his clothes so that he doesn't catch a cold. Aaron can pretend to be hurt, and suggest that as long as they're in the bathroom, his mother should help him take a bath. Sarah can regurgitate her patented line, "I don't know... I guess, it's okay." And then, they could continue where they left off.