
So long story short, I am now dating her brother, and this girl (my boyfriend's sister) had misunderstood me because of the issue that I have stated above. She's been telling their mom that I am a total "flirt", and because of my boyfriend's sister description of me, their mom hates me as well. Also, I've heard that they want my boyfriend's ex-girlfriend, instead of me.
Of course, It's affecting me big time, because their words hurt me, and the thought that they like the ex-girlfriend better, hurts me. I never really done anything wrong to them, but they loathe me.
I am trying to reach out and be nice with them, prove them wrong that I am not a "flirt" but whatever I do, they cut me off. How do I deal with this?