It's ok to be realistic and show the way relationships change, but
I totally get that a lot of relationships start out well but change when you get older - there become more and more things to fight about, especially as you have kids and get busy, and when you're dealing with your own problems like insecurity that affect the way you perceive your partner's actions. But I don't know if the ending was believable. I don't know if after all that fighting, all the hurtful things that were said between them, that it could be "redeemed" with one night, with one romantic speech from Jesse and a night of sex. You know a week later when they returned to their normal lives and jobs, Celine (she was mostly the "wrong" one in my opinion) would probably still be just as stubborn and angry, Jesse would probably mock her, and it would just continue like that.
I'm curious if anyone who's been married/been through similar fights has any input on whether this ending was realistic or not.