LB, Aww to your younger nephew apologizing. Intellectually challenged or not he appreciates you and you trying to help.
Since you're not going to your father's for Thanksgiving with his girlfriend's family it might be nice for you to go to friends T-giving to relax and have laughter with friends. Would do you good.
Sad that your sister never resolved her issues with your/her brother before he passed away.
Interesting your older nephew has a suitcase out and he hasn't done that before. Let go then wait to see what happens. For him to be successful at rehab he has to decide he wants to go. Might take a few attempts staying there too.
I'm rooting for him and his suitcase.