Fact is: we don't know if she's a decent woman or a manipulative climber. We don't know anything about her. I'm not going to cast her either way.
I can say I don't think they look good together because she makes him look old. He already looks old for his age, and she looks like a child. Mismatch to look at, IMO.
We don't know anything about him either if you're going to take it that way. Personally, I prefer to assume people are good before I start thinking they're manipulative. Alicia has a good rep as an up and coming actress with no reports of her being a diva etc etc - that kind of thing tends to get around.
What is it about some of these guys having a girlfriend or a fling that brings out the nasty?
