Wait I know this is a once off, BUT... it does dovetail nicely into Dr Scully's School For Exceptional Boys (I think that is the title?) in which S & M had been meeting covertly as S raised William, spending time together, and then as in canon, S gave up William causing an apparently unresolvable rift. Anyway, seems to dovetail nicely to me, although maybe that wasn't written or posted when this story (ITM) was shared and discussed?