Prompt:"I'd like Porthos to finally lose it over Aramis' risk taking.He hauls Aramis off to his room and ends up giving him a sound thrashing (a spanking, not a beating). Only it has an unanticipated side-effect in that it causes all those years of unresolved sexual tension to spill over, finally."

Fill: http://bbcmusketeerskink.dreamwidth.org/1213.html?thread=1299133#cmt1299133