My life is a disaster.

So about 8 years ago I was with a guy.. We broke up and he dated my sister. Ended up marrying her and having 2 kids. I ended up marrying someone and having a kid with him. But now we're split up. As soon as I moved my sisters husband started coming around a lot. Well now he's still living with her but he comes over a lot and is trying to end things with her but doesn't want her to keep the kids from him and wants us to be back together. I just need advice. No judgements.