I agree with everyone else. My step-mom is that way too. My dad and her got divorced but we still talked because she has been around since I was 7 but everytime I saw her all she wanted to do was talk smack about my dad. And even though I dislike my dad just as much as the next guy, he's still my father. So I stopped talking to her and her daughter and son. Then about 3 years later they all found me on Facebook and I added them but still kind of ignore them. I just hated how exhausting it was. I think drama is just unnecessary, especially when its about other family members. So I would just be nice but not give any of the drama your time. Its not worth it.