She came inside from the pool and asked if I would like to watch Her Masterbate

My Stepmom seems to be horny all the time. I came home and she was in the pool in a shiny spandex one piece swimsuit. I went inside but couldn't help but look out at her through the window. Her thick BBW body in a tight transparent bathing suit. She told me if I went and grabbed her vibrator she would let me watch her cum in her shiny swimsuit. I came so hard.