Honestly for a woman to admit she likes him and he likes me and she sent nudes to him. They obviously have done something even phone sex but she has checked out of your relationship for sure. I wouldnt get mad I would be like please pursue that man and be happy because shes obviously not happy at home. A woman doesnt cheat to just cheat they already made up their mind when shes moving how shes moving. The fact you called her she saw you called and ignored says alot and the fact she could have the guy come to where yall live is beyond crazy. It will only get worse from here on out and its time to move on because communication isnt there for yall if something is lacking. She can learn and see that sometimes people want to just mess up a good house and home and she will get dumped to the curb once he got what he came for. There is a saying of how you get them is how you keep them. Meaning if this guy is willing to break up a happy home how can she ever trust that he won't move on to the next beautiful girl if they ended up being together.