Wow! Your ex does expect a lot! By talking to you, he probably expects you to convince S to go to their home. I hope you put him right and let him know that it's up to S.
Interesting developments.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim