in laws issues... rant

The topic kinda says it all, I have 2 sister in laws, 1 is older than my hb, the other younger. He was middle child. I met my hb through the younger as we had been friends for 6 months, and when I met him, bam! Chemistry. She let me know that no friends are allowed to date her brother, he was coming out of a 10 year relationship, and she asked me to take him out and look out for him. We obviously started liking each other and started dating, and the younger sister wrote me off, made family gatherings bloody awkward with passive aggression. After 2 and a half years, I had enough, running around after her and getting trampled, so I started treating her the same. The oldest sister decided to stick up for youngest, and long story short, oldest grabbed me by the throat threatening to eff me up, and then my mother got hold of the both of them later that day and gave them a what the eff for, which sent them both running for the hills. Since then, it's been over a year, and I have seen the youngest and we are able to be civil, seen her twice in the past 2 months(since incident), which is still awkward. The oldest and I still don't want to see each other.... that's just my rant of in-laws. Tell me how lucky or unlucky you are and how you deal?