My Son is Moving Out as a Result of My Coaching

Hello. I am in certification and I told my son that I needed help with a coaching assignment and if I could please coach him. We have done it twice. He hasn’t wanted to coach again because when we do, he realizes he’s the problem. His wife told me that I come at him (meaning the coaching) now they’re moving out. I can’t help but feel they’re moving out because of coaching.  He has been avoiding me since Saturday morning. I feel horrible.