Don't know enough about quacking, but do know they like to bite the hand that feeds them. After my AH left us and moved 1500 miles away to "get a fresh start" with his lifelong friend, he turned on them. He stayed at their house for 10 months without paying a stitch of rent. He went to rehab twice(while threatening suicide), picked up for DUI hundreds of miles away, which they came, paid his bail, and drove him home. They did more than most people would do for a family member and all he can talk about is how selfish they are because they wouldn't give him one of their "extra" laptop computers, they actually wanted money for it. He is bitter and angry at this couple for helping him---but it wasn't the help he wanted--all he wanted to do was drink and feel sorry for himself.
Seek legal help, take care of #1-YOU, and let him wallow in the mud he has made.