"Lonely Step-Mum"

You and your step-mum have been up to naughty mischief while your dad has been away on his business trip. But he's back home tomorrow, so your step-mum wants to make it clear that your fling has to come to an end, and it only happened because she was feeling lonely. But you want to have fun with your step-mum one last time and threaten to tell your dad, so she'll let you cum over her tits one last time so you keep your filthy secret!