Yeah, but if he can manage to explain that their uncle used to do drugs and slap bitches -- surely something kids on the playground have mentioned endlessly -- he should probably be able to explain two women who love each other. Probably just a bigoted asshole, really.
They way I described it is still bigotry. He doesn't see it as love, he sees it as some freak shit. Freak shit he's glad to participate in, but doesn't want his grandkids knowing about it.
This is most homophobic men with lesbianism. They see it as something that's only for porn.