Sarah's lust

Sarah could feel every centimetre of Bob's cock inside her wet, aching cunt. She could feel the veins on his shaft, rubbing on the walls of her cunt and he stretched her hole open with each animal thrust as the thickest part of his young cock slid in and out of her.
Sarah was sweating and could only smell the smell of sex in the air as she panted heavily as she built to another orgasm, grunting a deep animal grunt that was loaded with lust and total release. She wanted to feel Bobs cum spurting into her, feel the heat of his young seed filling her.
Bob had held off as long as he could and as he was about to release his salty load inside his mothers cunt, he let her know he was about to cum by saying "grip my cock with that slut hole mum and I'll pump you full of my cum".
Sarah loved when her son called her a slut and talked dirty with her. She had taught him every kinky naughty thing he knew and he enjoyed showing her what he had learned.
His cock exploded inside her as he groaned loudly, arching his back as he pressed his cock so deep into his mother, feeling her wetness and heat against his balls. Sarah bucked her hips back up at him, wanting his big fat cock even deeper inside her as she felt his load filling her and she began to cum intensely, grunting deeply, her every muscle tense to breaking and her head going light.
This was Sarahs third load from Bob in 48 hours and she was hungrily looking forward to another one later that night as they fucked on webcam for the whole world to see.
As Bob pulled his cum coated cock out of Sarah and his cum began running between her arse cheeks onto the bed, she felt grateful for the last couple of years she had had teaching Bob how to be a stud fuck and eagerly anticipated the many years ahead of sex with her son and anyone else they could get involved.