Disowning Family Members

I never got why people forgive family for **** that you wouldn't even forgive a stranger for.... i think being family makes it worse and i have no problem cutting out people that piss me off (mainly why i don't know anyone)....

My ex's sister used to steal all her **** for decades, she kept forgiving her.. a few years ago she goes into her jewlery **** in a locked room and everything is gone.. boxes are there but all empty.. we don't talk anymore but i'm sure she forgave her again..