Do you feel like it’s worth trying to save the relationship

So small back story, my sister in law has never really welcomed me into her life and does not like me due to issues her and my sister have. (They used to be close friends) due to their problems she has always kept a distance from me. We have gotten into some disagreements due to their issues and her trying break my kids father (fiancé) and I up. Her and I recently got into a disagreement at house house and it turned physical. I tried reaching out to her saying that i feel as if we should grab lunch and talk about everything but she hasn’t responded. I’ve always tried to be civil with her due to the fact we are family, but no matter how much I have tried something always goes south. So now I kind of feel as if maybe I shouldn’t try anymore... advise maybe?