Crudely at first but then dominatingly

They faced each other naked, and she felt thrilled to see his cock erect for her, and at her use.

"Lets see, what's the best grip on this thing" First, she grabbed just the head of his dick between her fingers, and lightly tugged. She had done this before, on a flaccid cock, and expected it to stretch, but since her brother was at full mast, it just was a pinch of the tip of his cock. She was surprised at how badly he winced, so she decided to try another grip before he'd try to back out.

"Sorry, sorry! I didn't think that would hurt it! It's such a big strong dick I didn't expect that!"

"Flattery will get you far, but remember you put your tits on the line. And now they are mine!" He said, squeezing one of her nipples with what he figure was as hard as she had pinched him. But she was not deterred.

"MMMM that actually feels nice. I would have given you my tits long ago if this is how you'd treat them! Don't let go! Does this mean you like the dick pinch?" She said, gripping his dick head before and enjoying the shock in his eyes. But, to keep the game going she just put slight pressure on, enough to feel the resistance of his erection and then feel the blood rush in, this, he seemd to like. "But I bet you'll have a harder time holding my little nipple then I will this!"

This time she took his shaft in his hand, encircling it in the middle then pulling towards her. The foreskin moved with her hand and soon he swllen dick head was covered in foreskin, until the has gone about as far towards her as she could. then, she reversed direction, sliding back down the length of his cock slowly watching the head pop back out and and going until she was pressing against his pelvis, and letting her finger rest against his balls.

"Wow, allot of give here, does this hurt you or feel good?" she said, continuing to slowly pump his shaft, "Be detailed i need to know."

"This is good," Jack replied, and released her nipple, now tracing it's shape with one finger, she smiled appreciatively. As she got to the head and back down "And this part is great! When you go slow, it's like a massage, like a muscle tension you are relaxing, but over the head it's pleasurable, like jerking off."

"Interesting, so which of this feels best? she tried a slow stroke of the full shaft, then quickly, then shorter pumps at the base of his dick, the quick short jerk off motion over just the head of this dick, then just the shaft ignoring the head. "Remember, good details or I may hurt it on accident!"

"mmm, those are all good. The shaft is more like a massage, more like a comforting feeling, I like the full shaft, quick pumps on the bottom are the least enjoyable, and the quick ones over my frenulum could make me cum if you keep it up."

"No cumming! You walked in on me masturbating twice now so i need it more, and if you cum and get soft we won't finish out game!" She switched to slowly plumping just the shaft, to deny him pleasure. She decided to try using his schlong as a leash now. "We go until you got blue balls as bad as me!"

"okay, this means time to walk" she said, switching to pumping his cock head in the way that made his face look funny, then began to walk. It was every bit as fun as she hoped.

The power of it made her feel wetter than ever. As she walked pulling him behind, she loved to feel how easily she could move his whole body. She sped up a little, and he started to hump into her hand, to keep up. Then, she suddenly stopped, and watched as his momentum thrust his cock through her hand, till it reached the base and penetrated the circle of her hand.

She kept up a pattern, like this, wandering randomly around the house, enjoying how she could turn his whole body with her hand, get him to walk on tip toe and crouch down if she went a little lower. She would stop randomly to feel his dicks power to pushing into her hand, imagining it was her pussy, then she would start jerking him off slightly to signal it was time to go again. She could tell he was getting close, when she saw a little precum leaking out.

"Are you balls blue right now?"

"yeah, i'm gonna cum if we keep this up"

"They don't look blue, and they don't feel blue?" She said, grabbing them unexpectedly. releasing his dick in the first time in a while. "She put a light pressure on them? Promise they hurt or I'll make them hurt!"

"I promise! I promise!" he said, as she let go. "Honestly I'd go jack off if i didn't have something to do right now.

She smiled. "Well, good, I'm gonna go make myself cum, then I'm gonna come back and make sure you don't get to cum!" she turned to leave, but heard him say;