I am upset with my sister about some things she said in the past regarding my significant other. My sister never asked about my significant other, doesn't know him one bit, yet said "He has nothing to offer you." Another time she said "You expect me to accept him as family?!" When I mention my significant other, she has no comment. There are several more negative comments, but let's leave it at that. My sister didn't even know my significant other yet she said nothing but negative things or no comment. My significant other died and left me life insurance 2 years ago, but still nothing nice to say. However, recently I had a conversation with her and although she no longer thinks my significant other was taking advantage of me (and she had no evidence of anything because she didn't know him), she now says that my significant other's brother was taking advantage of both me and my significant other because me and my significant other moved into his brother's house and was paying rent. "You paid rent, didn't you?" my sister said. I say why shouldn't we pay rent if we lived at his brother's house? When I mentioned my sister's unreasonable assumption, she said "Forgive me for caring." But I don't think it's being supportive when you assume negative things without any knowledge. In the same way that my sister thinks my significant other's brother was taking advantage of me and my significant other because we paid rent for living at his brother's house, I think my sister thought unjustly that my significant other was taking advantage of me without justification, meanwhile insulting my significant other. I have tried talking to my sister about this to no avail or explanation, only leads to argument.