Okay, I think you're missing something here. Why does she want to sleep in a different bed and is not enjoying sex? I think you need to start thinking about her a little more.

It sounds to me like your wife probably went through some kind of post-partum depression that has escalated to the point of disassociation. Focus on her needs, she may need some help that is outside of your sexual needs. If you focus more on her and get her the help it sounds like she needs, you may find that things go back to the way they were with sex more often and more passion in your relationship.


And now my rant

A man is not defined by his ability to procreate. A 15-year old kid has stamina and can have sex 3-4 times a day.

A man is defined by his honor. Cheating on someone is cowardly and a way of running away from problems. "Man-up" and do what's right, not what feels good at the time.