Ahahaha well.
I'm not sure. It would be really hard to get to Shane anyway, but especially on the rebound. He's not really the type to do anything like that.
However, after he and Molly meet again they do get close. Not dating close, but considering Adam is the only person Shane was ever super comfortable with, it's gotta sting seeing him a little happier when he's around her. And it would be easy to confuse it for romance.
As for someone taking advantage of Adam? I dunno. There's always Eros and Licentia lmao but I'm not sure either of them would actually use their abilities on him. But I digress.
But I can't think of anyone from the like. MAIN cast who would, given the current canon?