Long story short I'm pretty sure my husband is cheating with a girl he calls his niece. She is a legal adult (Major ick) He calls her this because she is his best friends daughter. (Double major ick) So he has known this girl for quite sometime. In fact he has known her longer then myself, but no blood relation. However life has been bumpy recently and there has been an event that has shoved her deeply into his path. I've tried to be a good wife and stood by my husband as best as I possibly can. We are currently living in separate houses and trying to work things out. However she moved in next door and is over to his house moments after I leave for the night. She is younger and my husband has been messaging her deeply intimate and personal conversations. I am over to his house every day and message him multiple times a day. So my question is, is him moving to the next step and being physically intimate with her ok. Is there anyway infidelity is ever ok. I'm desperately trying to find out if I have done something wrong or if I deserve this. I have given up friends he didn't like. I never talk to any male's he doesn't approve of. I give him most of not all of my paychecks. I also take care of the house and kids. I have lost weight because he didn't like how my body looked. I color my hair and try to be as empathetic to his needs as possible. He doesn't like it when I talk about my feelings so I deal with them myself. When I had medical issues I was even careful not to say much about it but focus on him instead. Even though they caused some issues with our intimacy. Should I look the other way with this girl and just let him be intimate with her? Do I infact deserve this?