Conflict family

I have my brother he is 50 years old he's married a woman she is 55 years old now the are 22 years of marriage the have 3 kids.the have 5 years the not sleep together he's wife doesn't do anything For him like cooking washing he's clothes nothing she don't like working my brother does everything he's wife said she's not going to divorced my brother have a girlfriend she's does everything for him the have a little girl how my brother can do this is not a life something he's very depressed he's working hard to take care every single things in he's house he said he doesn't have life the are argues for nothing he said she not goings.to work her husband have to do everything by himself even the kids the have twins 21 years old the don't do nothing the treated them like a baby's even snow my brother have to clean if my brother going to the order state she never go out since my brother go back the have 3houses she found the other big single home she said she want a big single home with 3bath for the kids.my brother doesn't.know what he can do