As I passed my mother's bedroom I noticed that the curtains were drawn and the light was on - even though it was the middle of the afternoon. My curiosity got the better of me and I slowly eased the door open to see what was going on.
I could not believe my eyes at what I now saw.
There on the bed lay my mother, absolutely stark naked. Her huge floppy tits almost hanging over the side of her body.
It was not the first time I had seen her naked but the surprise was to see who was there with her.
There with his cock right up her flabby cunt was my younger brother, lying between her outstretched legs and plunging in and out of her cunt rapidly.
Not only that but at the other end was my teenage sister Rebecca (just 18) and she was playing with mother's huge floppy jugs whilst mother sucked on her cunt.
I knew mother was into incest as she had seduced me when I was a mere lad of 18.
She had said that she was so horny and had not had a cock inside her since dad had been killed in a car crash 18 months ago.
I was a bit of an innocent youth at that young age and so thought it was quite normal for a teenage son to fuck his mother.
What I did not know was that she was just at the end of her menstrual cycle and thought she was unlikely to conceive.
How things can go wrong! After she coerced me into cumming inside her three nights in succession she unexpectedly became pregnant.
So, my sister is also my daughter!
We continued sleeping together for a further 2 years, being very careful to avoid any further pregnancies.
I had enjoyed sucking her milk whilst she was breast feeding our daughter but after 2 years I had realised that it was not quite the right thing to do to fuck my own mother.
So I told her that it was over. She did not take it very well and from then on started to let herself go somewhat.
Now she was quite gross, with huge floppy tits reaching down almost to her pubes.
They were only prevented from reaching due to the fact that her belly was now absolutely huge, with massive rolls of fat that almost hid her cunt from view.
I was certainly not aware that she had taken in the rest of the family too, especially knowing the physical state she was now in.
My exclamation of surprise alerted them to the fact that I was there.
They must have known I was in the house because of the extremely loud screams I had emitted whilst being buggered by Chantelle's strap-on. They obviously must have decided that I was going to remain downstairs and so they continued with their pleasures.
Only about a minute after I entered the room my brother James started fucking mother even faster and I could see him stiffen up as he obviously approached his climax and filled mother with his semen.
His loud cry of triumph matched mother's scream of pleasure as she obviously reached her climax at the same time.
Rebecca removed herself from mother's face and I could see that her ass was very slimy and she had cum stains on each of her thighs.
It was obvious that James had fucked her ass earlier and mother was sucking his earlier sperm out of her.
I was now in a state of indecision.
On the one hand my cock was as stiff as it had ever been, signalling to me that it needed some action.
On the other hand my brain was trying to tell me not to get involved. I had renounced incest quite some time before.
After the family had recovered from the shock of being found out by me I could see they were all thinking of what they might say to me.
Would they be wanting to finish their play and hence wish me to get out of the room as quickly as possible or would they just ignore me and continue as though I were not there?
Rebecca was the first to actually say anything at all.
She said, "Well brother, are you going to join us or does what you see disgust you too much?"
I replied "No! I am not disgusted by what I have just witnessed but I am quite surprised.
I was not aware that mother had inveigled you two into her sexy incestual games. As for joining you, I had thought that I had given up playing incest but now I am at this very moment undecided."
My brother now decided to join in the conversation.
"I have always wondered if you had ever been playing with our Rebecca.
I did know that you had fucked mother for a few years because she told me so.
You are very welcome to join us."
Mother then added her short say.
"You are very welcome to join us. It would be so nice to feel your lovely cock back inside me."
Whilst she was saying this Rebecca had crossed the room and moved over to my side.
She wrapped her arms around me and planted a long sloppy kiss directly onto my lips.
I instinctively kissed her back and soon our tongues were intermingling.
She pulled away and said, very sexily "Please join us. I have wanted your large cock inside me ever since I was conscious of sexy goings on. Since I was at least 14 but realised that I would have to wait till it was at least legal - incest notwithstanding."
The sexy kiss had swung my thinking.
My cock was now rock hard and was taking precedent over all my other actions.
I grabbed Rebecca and gave her the sexiest, sloppiest French kiss that I could dream up.
By now my mother had got up off the bed and was standing staring at us wide eyed.
What a sight she was. Big floppy tits down to her navel, cum streaming down her legs from the fucking my brother had just given her.
Her hair was dishevelled, her make up all messed up.
My sisters anal secretions glistening on her face. I could see her bra at the foot of the bed where brother had thrown it after removing it from her.
Lying next to it were her discarded panties.
I took this all in as I pushed Rebecca onto the vacated bed.
I forced open her thighs and before she could even let out a squeak I had forced my cock into her slimy cunt.
I was surprised to find resistance.
I had not realised that she was a virgin and she screamed out as I broke through her hymen.
I muttered "Sorry sis, I did not know. I thought someone would have broken you in by now."
She replied, "I was hoping it would be you that took my cherry and now my dreams have come true!"
After this conversation I got down to giving her the best fucking of her life so far.
I enjoyed playing with her tits as I pumped my cock in and out of her.
I was quite surprised at the speed at which she came with another loud scream.