OK, old saying with a lot of truth. HOWEVER, if you want to keep a son (of which I have two), you stay out of his business and when he finds a mate, you bend over backward to enjoy her.
I only have sons so it has been extremely important that I leave them alone to run their own lives, marry who they love, and to never get into their business. They know I am here to help in any way I can when they may need it, but I do not interfere with their lives.
I LIVED MY LIFE, LET THEM LIVE THEIRS. Just be there to catch them if need be!