The only thing he's insinuating here is that Saki has all the hallmarks of a social misfit... and now, maybe, that her mother either has a) peculiar taste, or b) loves her kid enough to lie through her teeth.

As for Peter's tastes... He unconsciously tilts his head in consideration, but doesn't jump at the suggestion. Satisfied? Hm, not the right word. It's not like a bright, perky girl like Mary Margaret would change anything about his relationship to girls. He doesn't have much to do with them.

"I was just pointing out you couldn't have been serious about hating haunted houses and things like that--I don't really care what you look like. But you might want to stop lurking like that. Next time someone's going to walk into you for real."