Personnaly I would back off.....

My hubby has had in the past problems with his family but that is just as its said HIS FAMILY. He can do as he pleases with them as long as they are not hurting me (and not posting a pic of me and him on face book or whatever dont count in my book) then all is fine as its his problem not mine.

He is a big person now and able to cope with them in his own way if not and he asks for help then fine but not asking for help is a big sign to me for me to back off and remain silent on the matter.