I'm just basing my vote on her falling for John Rolfe when she was with John Smith.

Sorry, Jas. I don't think Jasmine would, just think the rest have bigger reasons.

Three classic ones - way too "classic" for this, way too idealized, their stories are way too idealistic. Belle likely sees classic princesses as role models.
Ariel - was willing to give everything to be with Eric.
Pocahontas - I just "love" when people say that Disney's belated and forced attempt to please historicians makes Pocahonts disloyal, lustful or something. They didn't bother with keep characters true to their original personalities in sequel.
Tiana - doesn't have much time for personal life. She starts as totally uninterested in men and romance and it's extremely unlikely that she will ever become the opposite. Tiana is also very loyal. However, unlike classic DPs, Tiana may probably cheat as a revenge.
Rapunzel - given the circumstances her and Eugene met under, any men will never become half as special for her as Eugene.
Mulan - she is way too critical of herself, she strives to be perfect. She wouldn't be able to forgive herself for cheating. Mulan would probably break up but not cheat.

I don't think Jasmine is capable of cheating but the rest( especially classics, Ariel and Tiana) are even less likely to do it. Mulan would be my second choice.

Where is Rapunzel..?

disneyfan500 Same reason why I picked her. I like to pretend that the second film didn't happen, but it did and I felt like she betrayed John Smith by choosing John Rolfe.

Oh ! I Forgot rapunzel !

They are not officially even in a relationship........that's what Mulan thinks.

Not too give the sequel recognition, but...