Enjoying very dirty experiences with our new friend
Copyright© 2025 by Abis Brother
Chapter 5: Dr. Anne’s Dirty Clinic
Incest Sex Story: Chapter 5: Dr. Anne’s Dirty Clinic - Warning: This gets very dirty indeed, so if you don't want to read about incest, scat, piss-play and more, then please move on to something you will enjoy. We take the dog for another walk and Abi talks about some new dirty things that she wants to try, then we plan how we can involve our new friend Anne in them. Then we meet and make them happen, then it is Anne's turn to plan our third dirty session. Anne leaves us consent forms and some optional clauses we can agree to, then it's time!
Caution: This Incest Sex Story contains strong sexual content, including Teenagers Consensual Lesbian Heterosexual CrossDressing Fiction Incest Brother Sister Anal Sex Analingus Cream Pie Fisting Scatology Sex Toys Squirting Water Sports Doctor/Nurse
Well, the day of Dr. Anne’s Dirty Clinic had arrived.
I met Abi outside the school gates and she looked both scared and excited at the same time. “Are you OK Abi?”, I asked. “Oh yes brother, I didn’t sleep a wink last night wondering what we’d be doing with dirty Dr. Anne this afternoon. How do you feel?”.
“I have no idea what to expect, but some of the clauses in the main consent form and the optional clauses form give me butterflies when I think of them!”. Abi nodded, saying “Yes, me too! I wonder which she’s going to invoke today?”
We set off towards the woods, and twenty minutes later, at just after 17:00 we pushed through into the clearing.
Dr. Anne had heard us coming, she was lying back on one of the stumps, dressed in a blue nurse’s uniform, with the front cut out up to waist level to reveal that she was wearing no panties, with her vagina on full show as she fucked herself with a very fat cucumber. We could see that the back of the dress had also been cut out of the skirt, meaning that her naked buttocks rested on the stump.
Dr. Anne was wearing black stockings, and a red and black suspender belt and black high-heel shoes. She had a little nurse’s hat on, and one of those upside-down watches pinned to the left breast of her uniform, where holes had been cut to allow her nipples to protrude through, each of which was being nipped by a large clothes peg.
“Well,” she said, smiling at us both, continuing to fuck the cucumber in and out, “I’m glad to see that the patients are here at last. Are you ready for the Dr. Anne’s dirty clinic Abi and Brother?”.
We both nodded.
“Abi, are you looking forward to doing extremely dirty things with Brother and me today?”. Abi said, “Yes, I am”.
“Brother, do you want to become even more perverted than you already are today, with help from Abi and me?”. “Yes, I do”, I said.
“Good!”, said Anne, slipping the cucumber from her cunt and sliding her tongue up it, before slipping it back deep into her vagina. “Thank-you for signing your Consent Forms, and the optional clauses”, she smiled,” I added the optional clauses as a bit of fun just to see how naughty you each are and what sort of limits you each had, and I definitely got some surprises”. Abi gulped and looked at me.
“As you can see I’ve brought all sorts of things for us to play with”
We both looked around the clearing. By the side of each stump was a folding camping table about 2 feet by 18 inches. Each table held a number of boxes and bottles, and mysterious packets, and a large cool box was placed just to the side of one of them.
Dr. Anne beckoned us over to where she was lying, sliding the cucumber out of her vagina. “Right, it’s time to start. Abi, get your tongue right up my cunt, NOW!”.
Abi gasped and stuttered, “Yes, yes, Anne”.
“That’s DR. ANNE, Abi! Just remember that I am in charge today, and you and Brother are going to do whatever Dr. Anne orders you to.”
Abi, nodded, said “Yes Dr. Anne, we’ll do whatever you instruct us to do”, then she knelt between Dr. Anne’s legs, leant forward and covered Dr. Anne’s cunt with her mouth.
Dr. Anne handed the cucumber to me and said, “Right Brother, lick my cunt juice off this as you take your clothes off”. The cucumber was streaked with Dr. Anne’s vaginal cream, and it tasted very dirty as I slurped at it as I began to undress, watching Abi slurping at Dr. Anne’s cunt, moaning with lust and excitement at her first taste of a woman’s vagina.
I pushed my trainers off as I untied my school tie and slipped off my shirt, then as I pulled off my trousers, watching what the two girls were doing intently, Abi raised her head and said “I just love licking cunt Dr. Anne and tasting your lovely dirty love juice. You are so wet and your cunt is gaping open after that cucumber. Please may I fist your cunt Dr. Anne?”. Dr. Anne smiled, “Oh yes Abi you dirty girl, you certainly can! Let me turn over first though”. Abi stood, while Dr. Anne turned around to kneel on the stump, spreading her legs as she bent forward to rest her head on it, reaching back to spread her bum cheeks, revealing her anus and gaping vagina.
Abi inserted three fingers into Dr. Anne’s cunt and began to fuck her with them. “Fuck me like that for a little while, then add another finger Abi!”. Abi nodded and looked at me, saying, “Dr. Anne’s cunt is SO wet brother!”.
By this time I had cleaned the cucumber of Dr. Anne’s cunt juices and was completely undressed, with my cock standing at full attention.
Abi pulled her hand from Dr. Anne’s cunt and slipped four fingers back in; Dr. Anne moaned and looked over at me. “Your cock looks very stiff Brother!”, I grinned, “Now, while you’re watching what you’re your little sister is doing to me, look in the Tesco’s bag by the cool box and you will find some high-heeled shoes, a pair of hold-up stockings, a bra and a pair of panties”. Abi was now thrusting four fingers hard into Anne’s cunt, making Anne moan with each thrust. She paused, asking “Should I stop to put them on Dr. Anne?”.
“No,” said Dr. Anne, looking back at me standing holding the girly underwear, “they aren’t for you Abi, they are for Brother to wear, so that he is dressed like a girl as we play our dirty games together”.
Abi, still thrusting her hands into Anne’s cunt looked back at me with a big dirty smile on her face, and said “Oh yes! Let’s see how you look dressed like a girl Brother!”.
I swallowed hard, and was about to protest, when I remembered the clothing clause on the Consent Form I had signed. Dr. Anne wanted me to dress like a girl, and I had committed to dressing as she instructed, so I was stuck with it! I lay the clothes on one of the tables and pulled a pair of black lacy panties from the top of the pile. I held the pretty little knickers up and saw that they were mostly see-through. I slipped off my socks and Dr. Anne and Abi watched as I pulled the panties on, pulling them up and over my hugely stiff cock. I was amazed at how smooth and sensuous they felt constraining my straining penis. “Oh yes, you look really good in girl’s panties Brother”, cooed Abi, “and I can see your lovely cock through them too”.
“OK Abi,” said Dr. Anne, “pull your hand out and fold your thumb into your palm, then enjoy the feeling of sliding your whole hand into my vagina”. I watched Abi slide her hand out of Dr. Anne’s cunt. She couldn’t resist slurping at the gaping hole as she prepared to fully fist another girl for the first time, then she slid her hand back into the slippery hole and slowly forced her whole hand up inside Dr. Anne’s body, watching raptly as Dr. Anne’s cunt tightened around her wrist.
“Oh, that is just so hot and dirty Dr. Anne!” gasped Abi. “Can I fuck you with my fist please?”. Dr. Anne grunted her agreement as she knelt there, with her eyes closed. I watched my sister start to fist fuck Dr. Anne, who panted or gasped at each deep insertion.