Allison and Joan sat together on the sofa, mother and daughter were waiting for Allison's husband Andrew to come and entertain them. Both of them were fully dressed but were struggling to keep their hands off each other. However they had agreed to do just that for the time being.
The door to the lounge opened and Andrew entered. He was wearing a pair of black lace panties which belonged to Joan, his 60 year old mother in law.
"Very nice," Allison said.
"Certainly looks very sexy," Joan agreed, "Now what have you got to do whilst wearing Mom's things?"
"Play with myself for you," Andrew replied.
"That's right show your naughty wife and horny Mom what you like doing with my sexy undies."
Andrew's cock ached with the passion in him and he opened his legs slightly as he slowly rubbed himself through Joan's panties.
"Not too fast, rub it slower, we don't want you make stains in Mom's things," Joan said.
Andrew did as he was told, gently caressing the end of his cock with his finger tips. His wife and mother in law watched hungrily as the masturbation continued.
Joan ordered him to take off the kinickers so they could see his cock better and as he did as he was told, a naughty little thought popped into her mind.
"Pretend that you are rubbing Clive's cock for us you horny bastard."
"Mom," Allison turned in surprise," that's bad."
Clive was Joan's other son in law, married to Allison's sister Kath.
Allison was so turned on by her Mom's desire and realised where all her naughty thoughts came from.
Andrew rubbed the pre-cum that was virtually dripping from his cock into himself.
"Rub Clive's cock for your Mommy," Joan said.
Allison watched as her husband's cock twitched and seemed to extend even more and she knew he was loving the dirty talk from her Mom.
"You've got a great cock Clive, let me wank you off in front of Ally, Kath and Joany," Andrew said as he gripped himself.
Joan reached down and pulled her skirt up, to reveal her red knickers. She reached inside them and was soon finger fucking herself as she watched her son in law.
"Would you like to suck Clive's cock in front us?" Joan asked.
Andrew nodded.
"Suck him until he shoot's his load in your mouth."
Andrew was gasping now as he wanked himself faster.
"Yes I want Clive to cum over my face and then you and Al can lick it off."
Allison was watching her Mom and her husband and knew that any second she was going to orgasm on her Mom's sofa. She stood up and pulled her trousers down quickly,
"I'm going to cum Mom, please lick me."
Joan knelt in front of her daughter and opened her pussy lips up with her fingers. Allison was dripping wet and Joan buried her face into her daughter's shaven cunt.