WOS - I have a daughter myself and although I have been offered in the past from teens to babysit I have constantly said no - as I would do nothing but worry the whole time I was out! Knowing what teens are like, I was more afraid of their mates being invited in to the house and them wrecking the place, but this really takes the biscuit!! Stepson or no Stepson, he would never be allowed to babysit my child. Telling your daughter he hates her is bad enough, but to harm her or even set down to watch porn when there would be a chance of the child walking in is not on. Please tell your husband about your laptop and get a security setting on it in order that it cannot be accessed. I wouldnt leave the stepson alone with your daughter again, until he can prove himself responsible and mature enough to help out in this way. Hope all goes well..
Regards