Hey, since we're on the subject of sisters.
I have a sister in law that's a trip. And man, I need to let off some steam here.
She was adopted and is considerably older than my husband (she's 51 now). We never knew each other well until she fell on hard time and we decided to open our home to her.
That was two years ago. She moved out shortly thereafter, and then had to move back in October, and she has just moved out.
But she is constantly trying to stir stuff between me and my mother in law. Among other things. Like being an alcoholic.
December just after Christmas she got drunk and wrote my mother in law a letter about how me and my husband were pieces of shit and then didn't talk to us for 3 or 4 days. She moved out, and then asked for money. Twice. Which we didn't have.
She thinks we do because earlier this month, we took out a small loan to redo our house and start our business. It's virtually all used up because we had our things in order to order and go. It was also my kid's 6th birthday, so she saw how we spoiled him. Our car was also broken into and the battery and spare tire were stolen only because they couldn't get our car started once they were inside it (surveillance footage).
And asked for money again.
Now, she popped in and saw all this and was ecstatic and over the moon and insisted on giving me a hug and told me how happy she was for us and then an hour later texted my mother in law about how distraught/distressed she is about something she heard while here.
She is absolutely incapable of feeling true empathy for another creature, human or otherwise. The world revolves around her. One of many examples: When she fell on hard times a couple of years ago (long before we extended our offer) she decided to put her two healthy labs to sleep because she didn't think they'd be able to handle being away from her instead of taking them to a shelter or a rescue.
Last time she lived with us, also, she decided to "surprise" me by picking my child up from school without my knowledge.
I was surprised alright. If she hadn't pulled into the driveway when she did, there was going to be a homicide right in front of the neighbors. Someone at his school was fired over the incident.
See, I mentioned she's an alcoholic? She isn't allowed to drive my child anywhere. I don't even trust her to take a fucking pizza out of the oven.
Anyway, I want to tell her to not have any contact with me or my family any more.
It's come to the point where I think she's flat out possessed.
Being diplomatic isn't my thing, so this is going to go off like a nuclear bomb.