When my fiance and I first announced my pregnancy to my family, my sister was a little jealous. I'm assuming it's because she was trying for a baby with her ex-partner, but they broke up because he was a cheater. I gave birth to my daughter seven months ago. Her name is Kaia. When I returned to work after 12 weeks of maternity leave, my sister offered to babysit Kaia once a week and has been incredibly helpful. Not too long ago, one of my close friends, who also recently had a child, approached me to tell me that my sister is in her mother's Facebook group and she's been posting photos of Kaia and she's calling my daughter hers. And she's also been calling my daughter by a different name. My friend sent me screenshots of my sister's post and I was completely disturbed, so I spoke to my fiance and we both decided we had to take action immediately. I went over to my sister's house and asked her directly about what she was posting on Facebook. She did not deny it and also had no explanation. Therefore, I told her she's banned from seeing my daughter. My sister flipped out and said I can't take Kaia away from her and then called me a selfish bitch. And she started crying. I've never seen my sister act out like this before. It was alarming. I asked her if there's anything else I need to know because she may as well just spill everything. So she shows me a framed photo she has in her bedroom of her and my daughter and on the frame it's written mother and daughter. I'm not gonna lie, I did call her crazy and then just left. I haven't spoke to her since. Although she continues to try to come over and calls me multiple times a day. My mind is an absolute mess. I don't know where to go from here. Am I the asshole for how I handle the situation?

You are not the asshole