Your brother should run from her and you should avoid talking to her! I feel bad for her to believe she needs a guy and I can't believe she actually admits it to her boyfriend's family. I know you don't believe her but it can't be easy to listen to her and I just think the healthiest thing for you would be to not be around her as much as you can avoid it. I don't think she is capable of having a healthy relationship and in my opinion no relationship is better than an unhealthy one.

I may not be single any more but I was until my 30's. In my early 20's I had relationships that were bad but I suffered through way longer than I should have. Wow, what a waste of time! Single life should be enjoyed even if you someday hope to be married. How can you ever expect to meet Mr/Ms Right if you are busy with Mr/Ms Wrong? How can you be ready for Mr/Ms Right if you aren't comfortable in your own shoes? Stay strong and don't let people like this get under your skin.