I recently got engaged to a wonderful woman. We don't fight and get along excellently and both love rash other deeply. She lives with her sister. Throughout the entire course of time I've been with this woman I've witnessed her sister run over her and act with outright malice toward her out of jealousy and spite. To name a couple instances: 1)we got to her house to discover her sister had shoved a ton of garbage bags full of clothes and junk into my fiance's car. My fiance put the bags in their garage so she could use her car. Her sister comes home and called her a "stupid f****** idiot." 2) there have been a few times when my fiance was out of town in vacation and I would call her after I got off work in the evenings. Her sister would yell at her to get off the phone as if she had something to do the next day. 3) my fiance evidently didn't clean a pot to her sister's standards so she hid the pot in her room until their mom came to visit upon which she pulled it out to make my fiance look incompetent. 4)my fiance asked her nicely to close the blinds in the kitchen which her sister was literally a couple feet away from. Her sister stood there and rudely says "no" and walks to her room.

These are just a couple instances of the things I've seen. It should be of note that these are 31 year old women. now despite seeing all this I have TOLERATED her sister and hung around with her for dinner and whatnot. Now to the real issue. My fiance is upset at the fact that i only tolerate her sister. She makes it a dealbreaker that I'm not close with her sister. By her own admission OUR relationship cannot be any better. But she can't marry someone who isn't friends with her sister. She can't understand that I have a hard time liking someone that goes out of their way to treat her like crap and I'm someone that gets along with almost everyone.

Just looking to see what others might have to say. As I said, I have tolerated and been amicable with her sister, but I will not say I'm close with her.