To be fair to your premonition, I have dedicated many a post to the Madame:
From Jill's perspective, figurative alarm bells should be going off all over the place where the mc is concerned:
- He's getting into trouble a lot (fights with the Jocks, naked on campus etc)
- Tried to burn down the prep's mansion (at least she somewhat believed that earlier on)
- He's joined the DIKs, a frat that Jill can't identify with (she even didn't like Rusty, the nicest guy from the DIKs)
- He's sleeping with other girls
- He drinks too much
- He's OK walking around with a dick on his head
But at the same time, in his defence:
- She enjoys his sense of humour
- She finds him attractive
- She's turned on by his cock
- Bella says he's OK
- He's fun to hang out with
- He doesn't judge her for her family association
- Deep down he's a good guy
- He doesn't make her feel uncomfortable, always trying to get into her pants (he's progressed things a few times but he's always respected her feelings).
So yeah, some good and some bad, but red flags are red flags, and they should never be ignored in a relationship.
Regarding Nicole, I've touched on this in the past, that relationship burned too bright too fast and there's nowhere else for it to go given she's just meant to be a side chick. So I guess we'll have to accept that while she's totally into the mc, she's 30, he's 19, she's got a kid, and she's really looking for husband material. That's not really the mc.