9pm

"Oh i think he's waking up" Mark hears a familiar voice say in the dark room in front of him.

"You decided to take a nap, so we decided to join you." A voice behind him says. He's laying on his side and he can feel soft skin all around him.

The light turns on suddenly.

"Im sorry Mark." Its Jenny speaking on the other side of the room still in her short skirt and tight top from earlier.

"I didnt mean to make it ao painful youd pass out. Just painful enough that that you'd realize how lucky you are to get to fuck me in a few days, and to help you resist temptation before that, so you can really appreciate what a gift it is for you. So ive adjusted your cage, and it shouldnt be so bad on you now. Good luck." She says and walks out of the room, shutting the door behind her.

Mark now turns his attention to the more pressing situation. He realizes he is naked in bed in the middle of a blonde sandwich, with a perky set of tits pressed into his back and bubble but pressed into crotch.

He's starting to feel a dull pain, but not as bad as earlier. The twins are barely 5 feet tall, and probably under 100 pounds a piece. He can escape if he wants. He starts to get up.

"Nuh uh uh" the girl behind him says rubbing his inner thigh. Mark feels a sharp pain. "Theres a little more room in this cage, so you can get a little excited and only get a little pain. But if you get fully hard it is going to hurt, and just a little less than before so you wont pass out, which means youll feel it until you calm down. If we want to make you fully hard, well of course we can, and really torment you. So i suggest you stay right where you are, and deal with a little sting every now and then."

"What do you want?" Mark asks out loud to whoever wants to answer

The blonde in front turns around to face him and tells him "we just want to spend the night with the luckiest whiteboy on campus. So you're going to lay between us all night, and behave yourself, like a gentleman. Try not to think about our tight little bodies, and all the things we could do to make that little cock of yours erupt. That dick belongs to Jenny."

"I just slept all day. Im not going to able to sleep tonight. What am i supposed to all night?" Mark asks.

"Well thats your issue. We are going to take turns sleeping, so one of us can keep an eye on you." The blonde in front of him says.

The girl behind him, who he would find out is Tina, falls asleep with arm wrapped tightly around him, pressing her body into his, as the the girl in front, Trina starts to talk to him.

She spends an hour or so telling him about her childhood, and school, and other innocent enough topics. Mark is finally relaxed and pain free, even to the point that he's somehow forgetten the fact hes in bed with two beautiful naked twins.

"Jenny told us about the study youre helping her with. It must be really exciting for you." Trina says.

"I mean, it is definetly interesting, and pretty fun sometimes." Mark responds.

"Knowing that all you guys genetically cursed with little dicks, will be able to grow them enough to actually please a woman, must be a big relief for you." She smiles at him.

"Well it ummm.... yeh its nice." Mark says.

"And i heard you got an assjob from Jenny's friend Kendra. That was probably amazing wasnt it?"

"Yeah"

"She has such a great ass for that. Dont get me wrong, i think i have a nice cute little booty, but its not big enough to wrap all around a big dick" Trina says as Mark starts to feel a little pinch, thinking back to his experience with Kendras magnificent ass cheeks.

"How long did you last?" She asks.

"Not as long as i would've liked" he responds.

"Like just a couple minutes or so?"

"Yeah about that."

"No Marky. Dont lie to me. It was seven seconds." She sternly tells him, and grabs his hand, bringing ot to her warm pussy lips, causing him to wince. "You have a problem. Even when you have a bigger dick, you just get too exicited, and can't control it. 7 seconds is not enough. You need to learn to control yourself. You need to admit you have a problem, to be able to fix it. Now, ill ask once again. How long did you last?"

"7 seconds" he mutters out, in a bit of pain.

"Good. Thank you for being honest... now, do you think any woman wants a man who can only last 7 seconds?"

"No."

"Okay, now we are getting somewhere."

"How do you suppose that you may be able to please a woman?"

"Learn to control my excitement."

"Thats a good answer. Anything else?"

"Umm... maybe... more foreplay."

"Another good answer. You are getting somewhere now. But i also heard that Kendra said you werent very gifted in that area.... but lucky you, im going to let you practice." Trina rolls her sleeping sleeping sister on to her back and then Mark on to his back. She then stradles him.

"Now the goal is to get me off, atleast a couple times, and to do it without getting too excited, because when you get too excited, it makes that little dick cum too quick. So focus on the task at hand, and pleasing me, not on your own pleasure." She tells him, as she inches her pussy closer and closer to his mouth, watching his face try to conceal the obvious tinge of pain.

Trina spends 3 hours instructing Mark, and riding his face to orgasm after orgasm, for her of course, while watching Mark's face grimace off and on for the entirety of the time. When she could tell he was in **** pain, she would slap his body and tell him "only think about the pleasure you can give me. Stop thinking about about the pleasure this tight little pussy could give you.". When she figured he'd had enough instruction and pain for one night, she gets off his face. Mark asks to use the restroom, so Trina gets dressed and escorts Mark still naked, while standing outside the door.

When they return. Trina wakes up Tina, and tells her its time to switch.

Mark gets back into the bed, laying flat this time, Trina on the wall side cuddled up with his arm, and Tina on the open side.