This is an interesting one to me. I’ve never cheated on a gf. I’ve been cheated on. I also always maintain long relationships. I have a friends group of guys I’ve known since I was a child. I would probably help them bury a body if they asked.

One of the friends in this circle has a pattern of getting into relationships, getting bored/having issues and sometimes cheats. I don’t condone the behavior and I let him know it’s messed up, but I’m not gonna put his life on blast and expose him either. It’s his life and business and I accept him for his flaws and strengths. To suggest that by association I lose all credibility , to me is absurd. If he asked me to cover for him, I would. Almost no questions asked. I don’t think that makes me awful. I’d give him shit for it, but I would. At the end of the day, our friendship supersedes his relationship with his gf. I’m pretty sure OP husband feels the same way. This is part of having a close male relationship. You learn to love the guy for his strengths and shortcomings, unless he’s a truly bad person and then you drop him. If I had to related this to myself, my gf would also be in the know because we don’t keep secrets. However, I’d still cover for a very close friend.