grr, I agree moving in is likely to build resentment. The statement about fraility was revealing. IMO H needs IC. Be proud of yourself for setting that boundary right away.
Counseling to bring your son some peace and help him adjust brings everyone to the table, but your son needs to be the focus.
I am so sorry this is afffecting your son this way.
BITS Me 55, ACK, when did that happen? Doesn't feel like 55 D 30 S 27
You create your own universe as you go along - Winston Churchill