To go or not to go?

My SIL never liked me. Even to the point where she told her niece that I’m a bad person and the repeated it to me. To hating my religion, to telling my husband not to wear religious clothing because it’s bad. To talking behind my back but she’s KISSING my ass in front my face. To ignoring me because she THINKS I’m taking her brother away from her. We’ve been together for almost 8 years now and know each other for 9 years.

I just gave birth to my first baby. And all of a sudden she’s inviting me to places and trying to be my friend.

Should I go hang out with her next weekend and NOT take my baby? The ONLY reason she’s asking me is because I have a baby now.

Keep in mind, I never stopped her nor will never stop her from seeing my baby. I just CAN’T EVER leave my baby alone with her because she gave her a WHOLE grape when she was just 4 months old.