Well, I know I'd like to see more one-on-one between John and his Sir
Perhaps you could slowly-but-surely add more boys, consensual at first and then sprinkle some dubcon in there... No more than three or four, I think – wouldn't want the audience to lose track of who's-doing-what!
Personally, I don't think full-on non-consensual is the direction this story's going... Dub-con's great, but non-con would feel forced, I think. Just my opinion, though!