100% That is for sure a possibility.
But for myself, I would not mind, if he does not get her back. I mean Patti is a great character and I think what she does happens to a lot of women in the real world too.
They got married very young and Mat got complacent, and Patti got bored with him. It happens in real life too. It does not mean that her feeling for him went away. A choice between cheating or not, sometimes comes down to a single moment of weakness. And this is probably what happened to Patti. In fact I'm seeing this play out in front of my eyes at this very moment in RL. (people I know, not my own wife....lol)
All I'm saying, is that you can also have a good ending, even if Patti does not go back.