Let me say I don't buy the whole business of Gwen succumbing to Norman's charms either.
But I have a question for you, G-Man.
If Gwen had a "moment" with Flash or Harry, would it have bothered you as much? Given all of Peter's activities---the Bugle, Spider-Man, and the fact that Gwen had no idea of about the webslinging, and the fact that Flash and Harry were friends of hers, is it totally out of the realm of possibility that she may have sought comfort with one of them and then regretted it later?