AITAH: for calling the police because my daughter for trying to hurt her little sister.

Hi so I 32 (f) has a daughter Kaylee 15 (f) she is a menace to society when she was 9 she lit my book on fire in my backyard but when I told my husband john 35 (m) he tole me that I was overeating so I dropped then when she 10 I got pregnant with her baby sister jessi 5 (f) she was angry then proceeded to grab a knife and ran towards me but my husband grabbed her and held her back. So here is now at her sister’s 5 birthday party 2 weeks ago she told her sister to follow her to her bedroom my mama instance turned on so I followed them upstairs were I saw my daughter kaylee got a pocketknife out her drawer. I did not know she had one and the stabbed her little sister stomach I ran inside her room and Kaylee‘s face went white I screamed then ran to Jessi. Kaylee just stood there her face turned back color she grinned so I grabbed my phone and called 911 and my husband came upstairs and looked at the scene and said “ well she probably provoked her to do that”. I was so mad 2 minutes later the police and emt’s came. Jessi was barely conscious from blood loss but was alive. My husband said if I pressed charges on her he would divorce me but I did anyways. The next day while I was at the hospital my mom called me screaming and told me that I didn’t need to press charges on kaylee and said it could be handled in the family so I hung up. So AITAH?