I like that us Matt fans aren't too delusional.
We acknowledged her stupidity to be involved in this mess. We know she deserves better but I guess she doesn't feel that way. Long term couples all def face a point where they either get married or don't, and her ex and her obviously reached that point.
But while we know that and disapprove it, we still like her as an artist. Being able to somewhat have a separation as a fan.
With that said my sister, was the other woman in a relationship, and she didn't even know until he kept giving her excuses and she did some researching and found out that he was still in a long term relationship. Luckily, it was in TNT beginning and she cut it off asap.