No, don't. You didn't marry your husband's sister. If she doesn't like you that's her own problem.

#11 if u were married 2 some1 wud u seriously live with ur sister? or have her round allot? no i didnt think so. idiot.

I don't think Back in Action meant that the sister would be living with them. He probably just meant they would have to see each other at family gatherings a lot. Idiot.

#19 how many family gatherings do u have? and she doesnt have 2 talk to her fae it uv lost. idiot.

It's a 13 year old boy, guys. He doesn't yet understand that family's an important part of marriage, both the family you're starting and the coming together of two families. Anyways, some close families have quite a lot of gatherings. My dad's side of the family used to get together once a week before my grandfather died, and go to a cabin to BBQ and such. Even after, they'd still get together once a week, and stay at home. My mom and dad would go, and take my sister and I, to most of these gatherings, even though my mom doesn't get along with my dad's family. You see, Batman(I just got my jollies for today from typing this), family may be very important to her husband, which is why OP wanted to rekindle a friendship that she thought had once existed. Even if you want to call everything I just said invalid, then consider the FML in someone you thought a friend(a great friend), telling you this.

The sister-in-law doesn't represent the entire family, you know. She's clearly a rude bitch and the OP should just try to build a relationship with the rest of the family and ignore her.