So I woke up on the Saturday morning with a nice hard cock and lay there for a minute contemplating what the day might hold.
Kath had her back to me and I turned on my side and thrust myself against her.
"Mmmmmm, that's a nice start to the day," she murmured sleepily.
Without moving she reached behind her and grabbed my cock,
"Is this for me or have you been dreaming about my Mum?"
I kissed the back of her neck,
"A bit of both," I said.
She rolled on to her back with a wicked grin on her face,
"Naughty boy!"
I kissed her and gave her left tit a playful squeeze,
"So is it today I get to play with these and your Mum's at the same time?" I asked.
"Oh you filthy sod, we'll have to wait and see. Anyway I expect Mum will be desperate after what happened last night, probably can't wait to get her old hands round your knob."
"So what do you want me to do?" I asked "I mean how shall we play this?"
Kath ran her own hands over her ample tits and let her right one continue all the way down to her pussy.
"Well I think you should just continue where you left off last night and see what happens."
"So?" I said "What do you mean by that?"
She smiled, "Get up go downstairs, wait for her to come down and get to it, then I'll come down and see how the land lies."
"But what if she goes off it?"
"Look last night you fucked her, what is she going to say now. No I have my Mum's genes baby, she is gagging for it."
"Yeah but what is she is not keen on the Mother Daughter thing?"
"But that time she will be so hot and wet, she'll do anything, just like me."
Five minutes later I was in the kitchen making tea as noisily as possible in the hope it would attract Joan's attention. It worked!
She walked into the kitchen wearing a pale pink dressing gown and simply said,
"Good Morning."
I looked at her and smiled then looked past her as if to make sure we were alone. She turned her head to follow my gaze.
"Is that all I get after last night?" I said.
She went bright red and gave me a half smile,
"Yeah well about that, I'm not really sure what came over me and to be truthful I've hardly slept."
"Why, because you couldn't wait for more?"
She gave a nervous laugh and then said,
"I was thinking more about what Kath would say and do if she knew."
I stepped forward and put my arms around Joan's waist. She took a half step back.
"Kath was asleep when I left her last night and asleep when I got back, just like she is now."
"But....."
She didn't get any further because I took that step forward and pressed my lips against hers. I ran my tongue over her lips.
She pulled back,
"Don, stop it"
I ignored her and pulled the belt of her dressing gown, so that it flipped open to reveal that she was only wearing her pyjama top.
"No way Joan, I need your horny body again."
"But what if Kath comes down?"
"Fuck Kath I need you,"
I grabbed her again and pulled her to me, my hands going straight round to her arse which I discovered was covered by a pair of silky panties. I kissed her again and she seemed to melt into my arms and responded hungrily with her tongue.
I slipped my hand inside her panties and started toying with her arsehole. She arched her back in excitement and let out a loud long gasp as I slowly worked a finger into her rectum.
"Oh God, you horny sod," she said as she started to pant.
"Turn round," I said "and grab the table and bend over."
She obeyed and I knelt on the floor. I pulled her dressing gown up and pulled down her white panties. Her hairy arsehole was right in front of me and I delved straight in with my tongue.
Her panting & gasping grew louder as my tongue toyed with her and I ran the fingers of my right hand up and down her wet pussy lips.
She tasted wonderful, the iron taste of her arse mixed with sweat and the pussy juice that I was lubricating her with as I rubbed her.
I sensed rather than heard Kath and looked up for a second to see her standing in the kitchen doorway. She was completely naked, her right hand was pressed against her black pubic hair and she had a finger curled into her pussy, whilst she fondled her right tit with her left hand.
I went back to her Mum's arsehole for a few seconds before leaning back and spreading Joan's bum cheeks with my hands so Kath could clearly see her Mum's glistening rectum.
I watched as she pinched her right nipple and as another couple of fingers slipped into her wet cunt.
"Don't stop," Joan said
"Don't stop what?" Kath said.
Joan literally jumped a few inches in the air and as she turned to face her daughter, I could see that the colour had completely drained from her face.
The confusion was evident in Joan, she thought she had been caught by her daughter with her son in law, but at the same time her daughter was standing there completely naked obviously masturbating.
Joan slowly stood up and looked at me and then at Kath who hadn't stopped fingering her pussy at any point and for a few seconds the only sound that could be heard was the squelch of Kath's fingers going in and out of her wet cunt.
Kath arched her eyebrows,
"No need to stop on my account I was just enjoying watching."
"So I can carry on?" I said the question aimed at my wife.
Kath continued to finger herself and I noted that Joan was watching intently.
I put my hands back on Joan's waist, but she flinched away.
I didn't let that put me off though and I reached up and slipped her dressing gown off her shoulders and in a semi trance it seemed she let me take it off.
Kath stepped forward and gently touched her Mum's face,
"Have some fun Mum, I know you want to. Don has told me all about last night and as you can see I really don't mind."
Joan seemed to press her face against her daughter's hand and smiled.
"You want to watch your husband fuck me?" she said in a whisper.
Kath took a long deep breathe,
"Yes I want to watch my husband and my Mum together."
Joan unfastened her pyjama top and took it off and then stepped back into my arms and started to kiss me hungrily.
As the kiss broke off, she said,
"Let's go to bed, I don't think you finished with my arse."
The three of us went back to our bedroom silently and my Mother in Law threw herself face down on the bed. I stripped off completely and went straight down on her arsehole again with my tongue. Kath positioned herself on an easy chair next to the bed, her legs wide open and started to masturbate again as I licked her Mum's arse. Joan faced her daughter and as she watched her oldest child play with herself and as I licked her tight arsehole, she started to flood our bed with cum.