IB, You are doing the right thing.

Your son is old enough to figure out his relationship with his dad.

This is a boundary that I set early on. Son was 17 when this blew up. I have not ever said a bad word about his father, nor was he privy to everything that transpired.

I let my xh know that I was not going to be involved in their relationship and will not get in the middle. I told xh that this is his relationship to forge or not. His choice and son's.

It is a boundary I did not allow to be broken.

My son was very angry for a long time and say xh sporadically. Slowly, as time went on, the anger has dissipated and they have become closer which was always my hope.

Their relationship is far from perfect, but, it is one in which they have have figured out.

Make it very clear to your xh that you respect your son and will not be pulled into their relationship.

And then get out of the way.

You can do this.