I really need some help and advice?

now that you've grown, your body had changed obviously hes thinking something bad. if ur mum invites him again and ur alone with him tell ur mum u need to go somewhere else becoz of bla bla bla. when you take a bath or change clothes make sure ur window is close or coverd with curtain. change in the corner where he cnt see you. and if he do it again report it to the police.