Boarding started, and I sat on the back seat and mum sat on my lap, she was touching my thigh, gently stroking it as Bob was handing all our passports and tickets to the receptionist, mum whispered, "I love you too, I am comfortable with sharing you with gran, my pussy is still tingling. I will tell Bob that I will sleep in the same cabin as you and gran tonight because of his snoring."
Bob then drove on board. Mum had an overnight bag with her things for tonight along with Bob and my stuff. The cabin with the outside window had a double bed and two single bunks above, mum said, "The double bed will give Jack plenty of room and mum, and I can have a single bunk each. Bob let's see what your cabin is like."
We then crossed the passageway, and Bob had an inside cabin with four bunk beds. Mum told Bob that she would sleep in the other cabin. She then gave Bob his toiletries bag and fresh clothes for the morning. Bob then went off for a coffee, and we went back to our cabin.
Gran locked the cabin door then sail, "Jill, I'm so happy that you're here, Jack and I have had four exciting years together, he keeps me young. Do you still have sex with Bob?"
Mum smiled then said, "I've had no sex with him for over five years, sadly for me, he can't get it on. He's so excited that he is visiting an old friend in Lyon this week and he will stay with him for a few days. I will tell Bob that I will stay in Evian and help gran sort out your apartment then fly home in a few weeks."
Gran said as she took off her top and skirt, "Jill, that's a good idea, let's all get naked as I am so hungry for Jack's big cock."
Gran was now bobbing up and down on my cock, mum was sitting on the edge of the bed, I looked at her and said, "I love my cock being sucked."
Mum replied, "I love to suck cock, yours is the biggest that I have ever had in my mouth and my cunt, I love my pussy being eaten. I'm glad we are doing this, I am so aroused that I am doing this with you and mum."
Gran came up, and we kissed as she straddled my rock hard cock, our tongues were in each other's mouths exploring. I squeezed gran's massive tits as gran teased her clit with the bulbous tip of my cock. I sucked on one of her hard nipples then sucked on the other then gran pushed down on my cock, gran took my full length then started riding me.
I looked at mum; she was looking at gran as her mother was riding my hard cock. Gran's massive tits were bouncing in every direction. Mum now had two fingers pounding into her wet pussy, mum said, "I can't believe how arousing it is to watch mum fuck you, I can't fucking believe that we are doing this, me and my son and my mother."
I said, "Come to me, mum."
Mum replied, "Jack, let me please watch, it's arousing me so much."
Mum's thumb was now working her clit as she pounded her wet pussy with three fingers.
Gran said, "Tickle my ass, Jack."
I used some of her cum as lube, and as I slid my finger inside her ass, gran said, "That's beautiful, finger my ass and fuck my cunt."
I knew gran was now close to orgasm as she always talked dirty before she came.
I asked as I now had two fingers in her ass, "Do you want me to ass fuck you?"
Gran said, "You dirty fucker, dig those fingers deeper in my fucking asshole. Fuck me, Jack, I have wanted this all fucking day, make it good for me darling, get your fingers deep in my ass."
I looked for mum, and she wasn't there, she was standing close to me with one hand playing with her big tits and the working her cunt, mum said, "You are fucking my mother, it's so naughty and dirty, I need to cum too."
Mum was really rubbing her pussy, I said, "Kiss me, mum."
She did, I played with her beautiful tits with one hand as the two fingers of my other hand were finger fucking gran's dirty hole as gran was fucking my cock. Then gran said, "I'm cumming, I am fucking cumming."
The tenderness of mum's tongue in my mouth as I squirted my spunk inside gran's cunt was a strange sensation. The kiss lasted well over a minute then mum said, "That was beautiful, it's so naughty and dirty, you were kissing me as my mother was climaxing on your hard cock then you squirted your hot cum inside her cunt. It's the first time in my life that I have been kissing a man as he ejaculated."
Mum then kissed me again then said, "Mum, would you mind if I spent some time with Jack? I would like to get to know him."
Gran replied, "No problem, I'll shower then go and look for Bob. It's now coming up to five. I will come back at six-forty, that will give you time as we have a table booked for dinner at seven."
Gran then had a quick shower and left. As she left, she said, "I'm fucking my grandson, now I am doing threesomes with my daughter. I love it, it's so fucking dirty it makes my cunt wet. I am off, you two have lots of fun. Tomorrow on the drive we can change, and I'll sit on his lap, but I will lube my dirty hole so that you can ass fuck me then."
I said, "I love you, mum."
"I heard you say that to gran too, do you mean it when you say it to me?"