Writing Prompt: Sister's Learning Experience 2

This is based on u/nickdgardner idea!



As Mark felt his sister hand sliding inside his pants he shifted away. "Hey! What's the big idea! You can't do that"
"But you're in pain. I just wanna help!" That wasn't the true. Lauren wanted to know better about boys and their private parts and her brother was the only one available. It was an occasion she couldn't lose.

"Let me see if everything is ok" she said kneeling in front of Mark and placing her hands on his legs. There was a moment of silence. Lauren stared at Mark searching for any sign of disapproval. But he didn't reacted or say anything.

That was a good thing. Lauren decided to try a little less direct approach.
With the tip of her finger she began to poke on Mark's shorts.
"Does it hurt here?" Her brother said no. "Here?" She tapped the base of his penis. "No"

"Here?" "Ouch!" Mark stepped back as his sister finger touched his right ball. Lauren smiled. "That's no good..." she reached his crotch and cupped his balls. Her heart was racing. It was the first time she touched a boy on his privates.

"Does it hurt if i squeeze?" She slowly closed her hand on her brother's balls. They felt squishy and extremely delicate. Mark stepped back again when his balls began to hurt. "Don't squeeze them!" He exclaimed.

Lauren walked again towards Mark. He let her touch him again. This time Laured massaged delicately his balls with the palm of her hand. "Don't worry it looks like everything is ok!" She said pretending to be an expert.

"They didn't broke!" She exclaimed and slapped playfully Mark's balls. It was oddly satisfying felling them bounce inside his shorts. She needed ti explore more about balls and how they can really hurt a boy.

"Can i have a closer look?" She tugged on his shorts lowering them a little. "No!... i don't want!"
"It's for medical reason!" She said smiling. "I... i wanna see something to!" Mark said with embarrassment.

That was an unexpected turn of the events. Lauren didn't want to take off her panties in front of her brother. That was too much for her to handle. What to do then? "I can show you my boobs..." yes that was something she could do.

Mark considered the deal. "Ok! I'm in!" Quickly Lauren grabbed Mark hand. "Not her let's go in my room" Exctied she almost dragger her brother in her room. He was willing to show her his balls. She must make the best out of the situation. Her mind worked fast and she build up a plan to take advantage of her brother.

"Lay on the bed!" She said. Mark didn't know what Lauren had in mind but surely he didn't want to lose the occasion to see her boobs and did what she asked.
He stared at her while she was busy searching for something in het drawers.
Lauren picked some scarfs. "What are you going to do with that?"

"I must tie you on the bed" Mark swallowed but didn't say anything. Boobs are too important to argue now with Lauren.

She was glad to see that Mark was willing to be tied. "I don't want you to touch my boobs so i need to secure your hands" she explained tying Mark's wrists on the headboard. "And i must be sure you won't run away before showing me your willy!" She added and secured Mark's feet to the bed posts.

It was a delightful sight. Mark tied on her bed! She sat on the bed. Her hand began to play with the waistband of Mark's shorts. "First the boobs!" He said like he was in control of the situation.

Lauren slapped his balls a little harder then before. "Ouch" Mark struggled against the ropes. For the first time he began to feel vulnerable. "Right. That was the deal!" Slowing lauren lowerd the straps of the sportive bra.

She forced the bra all the way down to her belly. Mark's eyes gulted to his sister's breat when it come to sight. "Ooo... they... are very nice... hey!!" Quickly Lauren put on the bra again. "Show me a little longer..." Mark was now regretting to be tied.

"We didn't say anything about the time!" Lauren said in a sing song voice and proceeded to lower Mark's shorts.

There was a noticing bugle on his under wear. She poked it "balls or willy?" "Willy..." said Mark visibly in discomfort.

Lauren decided to not wait any longer and lowered the underwear as well. "Ooo... they... are very nice..." she said staring at her brother exposed manhood. "Enough! Cover me!!"

"Ahahah i think i gonna take some time to learn about boys..." Lauren cupped his balls and squeeze them harder and harder. Mark tried his best to endure the torture. He wanted to be the tough boy but he couldn't. "Aaaa...aaasss... you're hurting me..."

That was it. Balls are really that weak? Lauren let them go and watched them regaining their form. They were so ood. She needed to punch them. "Aaahh stop. Untie me!"

The punch wasn't too strong but Mark didn't want Lauren to go on.

"What happens if i.... flick them?" She asked and flicked Mark's balls without waiting for an answer. Her brother moaned in pain at every filck. "Ooo... aaa...stop!!"

Suddenly Lauren's phone began to ring. It was Alexandra....

.....

It will be fun if someone else go on with the story!!