You are helpless as she puts you into her panties, you can feel yourself grow hard at the feeling of the frilly silky fabric caressing you overly sensitive skin.
You hear your mum typing away at your pc, then the familiar ding and your mum gets up. She walks down the hall “Heya babe, Jeff’s been annoying me, do you have time for a quickie?
The other person responds “I’ve always got time for you mum, what are you in the mood for? Do you want me to take him off your hands for a bit?” You can’t believe your mum is going to have sex with your sister, let alone force you into doing the same. “I’m happy to keep him I just think he needs a reminder that he is my cock and I only let him have a body because your dad won’t be with me with one. In fact if you’ve got time do you want to teach him how a real cock should behave?”you feel scared at that thought, that you might not exist as your sister takes your place.
“Really, you’d let me be your cock? Just let me send a text and I’ll show him how to be a good cock, you can keep me until Saturday evening if you want mum”(5 days) a few phone clicks later and you feel your mum’s blood flowing into you, making you tent her panties clouding your mind with thoughts of sex.