My wife had an affair, she came back because of the kids. She told me she doesn't love me any more. What should I do, because we still sleep together?

It sounds like you need to seek counseling if you want to continue in your marriage. It's not healthy to live in a love less marriage. Perhaps she does love you, and is feeling neglected. Communicate to get to the root of the problem. Good luck

Then be nice to her that's what woman consider is love were men think sex is love. I learned it in my ethics class

Instead of wondering what's up with her, you should be talking to her. Why do you allow her to come back after an affair in the first place, and let her sleep with you?

No excuses for cheating, and no excuses for allowing it either.