I think I’m going to kill my sister tonight!!!!

She was holding my baby and I don’t know how but something snapped her long nail... you know how you react to pain by doing something without knowing? She bite my child without realising she was doing so!!!! I have never been soooooooo mad like I am right now! I told her that I never want to see her near my child again... I may have said a few hurtful words to her. I now feel bad because she didn’t mean for that to happen, she always comes to baby sit, she treats my child like my child is hers, she prayed with me during my ttc period for me to get pregnant, she was there all through the pregnancy, she even watched more birth videos than I did in preparation, she was there in the labour room, she gave my baby my baby’s first bath, she’s here anytime I need her but I’m just very upset right now.... I don’t know if I overreacted but I was angry especially with how much baby was crying...I saw it all happen and I can’t even get the image of it out of my head. My sister is an adult. Usually when she’s experiencing pain, she bites her hand to relieve the pain... but this time around my baby was on her arm as she was seated on her laps so she actually bite baby instead 😡