Go upstairs and join the fun

I put my new phone down and crept up the stairs. I could hear James's muffled voice:

"Uh, uh, oh yes, sis! Uhmnh..." Then I heard a loud fart, then a slurping noise, and James's voice again:

"Ugh, Mum, you're disgusting!"

"And don't you forget it, sonny-Jim! Now lick faster!"

I reached the top of the stairs and headed along the landing to our bedroom door and looked through. The first sight I noticed was my daughter's perfect, pert butt, humping up and down on her brother's rigid cock. Although she had her silky smooth back to me, it was doing very little to hide her massive breasts, wobbling manically around in time to her cock-riding.

"Yes! Work that pussy, boy!" instructed my wife, oblivious to my presence. "And Lucy, give your mum a kiss."

Kirsty and Lucy's huge pairs of tits pressed against each other as they both leaned forwards and locked mouths in a deep, passionate embrace.

By now my dick was hard and ready for action so I moved to the side of the bed, taking in the magnificent sight of my wife and daughter making out on our bed, their ample tit flesh pressed together, my son working on both their pussies with different parts of his body. My stomach was churning a little and the pressure built in my gut, and I decided this was an excellent way to announce my presence.

I let rip with a resounding, butt-shuddering trump, and Kirsty and Lucy broke apart with wide, lusty smiles on their faces.

"Hello there, Daddy, dear," greeted Lucy. "Mmmm, your cock looks tasty. UH, James, YES!"

My eyes were still fixed on the mounds of tit flesh in front of me and so I shoved my head in, taking one of Lucy's nipples in my mouth, running my tongue around it and then sucking eagerly on it like a starving baby.

"Mmmm, yes, Daddy!" said Lucy, then I felt the pressure of Kirsty's breasts against the back of my head as the two women kissed again. I felt Lucy's soft hand on my cock, gripping it gently and start to rub up and down the shaft.

It was hot and uncomfortable among the massive tits so released Lucy's nipple and instead stood on the bed, lining my cock up with my wife's and daughter's tits. With a hand on each of their backs I slid my dick in to the middle of their massive mammaries, thrusting in and out. I loved watching how Lucy's tits moved in rhythm with her riding of James's cock while Kirsty's moved much more subtly as our son licked her out, and bounced more rigorously with my own thrusting.

"Ah, ah, I'm coming!" yelled Lucy in delight, squealing incoherently as she reached her orgasmic climax. This took Janes over the edge and he grunted loudly from under Kirsty's arse as he filled his sister's pussy with cum.

"Uuuuuh!" yelled Kirsty, thrusting her hips against James's face, the poor boy spluttering as his mother's juicy cunt smothered his face with her sticky fluid.

"Your turn, Dad," said Lucy as I thrust harder into her and Kirsty's tits, eventually blowing my load somewhere in there.

I got down from the bed and helped my wife and daughter get off of my son, who lay exhausted and spreadeagled on our bed.

"Whoa, what an afternoon," he finally said when his breathing returned to normal.

"Mate, I've had a whole weekend of this," I replied.

"And I reckon there's more to come. Let's go and see what's in the box!" said Kirsty.