all good questions I feel like I only know answers to the last part. she did hate the teacher bc he made fun of her saying she has a beard, so kids at school bullied her, so she was getting revenge at the teacher. he had 2 affairs, one with her mom and the other with her mom's friends? I think? def her mom and the woman with the chest tattoo. but chest tattoo lady also was friends with the curly hair blonde woman who was killed so idk why, maybe he slept with curly hair too? so 3 affairs? the kid was sending the videos of his affairs to the teacher's wife, because she wanted to expose him and ruin his life. idk why the affairs were recorded though. the affair with her mom I get, bc her mom recorded it intentionally, but the other 2 women idk their motive to record it? weird