Help!!! Dad's mate is back!!!

No, no, no, that can't be true!!! After a year, Dad's mate is suddenly at the door again!!! Dad is still on the late shift and he shamelessly exploits this for his perverse games!!! He's got another bag of clothes for me because I'm a year older now, he says... What am I supposed to do? Dad doesn't believe me anyway! It's really cool to be taken like this by an older man, but I've only just had my first real boyfriend... What am I supposed to do?