What are the signs he is still sleeping with his wife?

Pixel Pioneer is right; the real issue isn’t what he’s doing with his wife, but your self-worth. Are you perhaps recreating a past dynamic where you felt neglected or unseen? This situation has all the hallmarks of low self-esteem and a tendency to accept crumbs of affection. It’s vital to understand your attachment style and why you’re drawn to emotionally unavailable partners before experiencing further trauma.