Yeah me either. It's very clear she loves Ian. When he rejects she moves and fucks Jeremy and when Ian asks she basically tells him this. It's only when Jeremy tells her than Ian LIKES the pics he's been sending that Alison thinks she still has a shot. Hence her going for one more attempt at Ian. But, to my knowledge, she's never treated Ian wrong. She hasn't acted like Robert, Seymour, Axel, or Louise. I also get the feeling 100% that when/if we get the chance to tell Alison we want her to be ours in a relationship she wouldn't be fucking with any other guy unless Ian tells her he wants her to