Erectile Functions

Claire eyed him suspiciously, especially since Mia couldn't quite control her tongue or her body.

"I believe there is only one right choice on this one and I believe I deserve it at this point."

"Get on with it." Claire said with an eye roll.

"Okay. Either your penis grows when you hear 'grow penis grow' or it shrinks when you hear 'shrink penis shrink'. Both return to normal size over time." He paused briefly to let it sick in. "I think we all know the right choice here."

You could practically hear Claire's eyes rolling as Ryan flashed a cheesy smile. "C'mon..." He said as Claire put her head into her hands. "Would you rather I had a worthless, tiny penis?"

"I'd rather not know anything about your penis... But I get it. I just feel like it could lead to some more problems." Said Claire, with a sense of dread.

She hadn't made her mind up, but the card disappeared from Ryan's hand nonetheless. Mia had decided. Her hands held tightly to both of Claire's as she shouted at Ryan, "Grow penis grow! Grow penis grow! Grow penis grow!"

Claire tried to pry her hands away to stop Mia, but Mia gripped her even tighter and repeated herself. Mia was trying to be good, but was tantalized by the thought of Ryan's gigantic cock springing up into sight. She could see it now as she spoke the words and it pushed the pillow aside, now unable to cover Ryan's growing penis. It emerged from Ryan's crotch like a behemoth, growing in girth and size until it was 10 inches long and almost as thick as a can of soda. It was beautiful and leaking cum down it's massive length. Oh how she would feel if she could just wrap her hands around it and inhale. She wanted her twin in her, filling every hole.

Claire finally managed to pull herself free and cover Mia's problematic mouth while she was hypnotized by his magical member. Too late. The damage had been done.

Ryan couldn't even cover his erection now. The tip of his rod passed above his abs and his fingers couldn't even wrap around his girth anymore as he placed a firm hand around the base of his leaking cock. Cum trickled down his fingers, but he was dumfounded by the sheer size of his genitals. He placed a second hand on his shaft and felt up his stiffened length, uncaring to the struggle his sisters were having. "Fuck yeah!" He said as he whacked his cock against his chest just by flexing. His big, meaty length smacked into him and a splash of cum splattered against him. "Grow penis grow." He muttered to himself and watched his cock grew another inch in his hands. It felt empowering and sexy to watch his manhood grow on command and turn into the womanslayer he always wanted. He could get any girl he wanted on her knees with this.

"No penis no. Don't encourage her." said Claire as she turned back to see her brother admiring his fully erect penis with both of his hands. "Dammit! You're stroking yourself." She turned back to Mia, trying to avoid looking at the 11 inch elephant in the room, that despite every protestation in her own mind, even she had to admit that its sheer size made her wet her panties just a bit. If that was the case for her though, Mia must be creaming herself.

Again, Mia had one hand rubbing the leggings above her crotch since one of Claire's hands was occupied with her mouth.

Claire could hear the slow, squishy strokes of her brother behind her and Mia was losing all control. "I guess this is my life now." She thought. "Letting my siblings masturbate because they might otherwise be fucking right now..." She signs a breathe of unbearable frustration. "This is not what I imagined being bigger sister as... At least Mia is still clothed."

"Ryan Dean Quinn..." Said Claire through gritted teeth, using his middle name as a marker of severity.

The stroking stopped. "Yeah..."

"You got what you wanted. Can you please stop inspecting yourself?" Claire wanted to give him the evil eye, but she didn't dare turn around for fear of seeing it again.

"Yeah." Ryan sounded dejected, but Claire could still hear a soft, slick sound that meant he was still feeling himself if not to pleasure himself to completion.

Claire closed her eyes and tried to block out everything and retreat to a safe place in her brain, but a vision of Ryan's massive cock jerking until he explodes all over her pervades her mind. He jerks violently as he grunts, Claire is on her knees in only fishnet stocking and waiting eagerly for him to climax. His cock finally pulses shooting a string of jizz that lands all over her perky, pierced breasts, toned chest, and salivating mouth with a loud...

Ding. A new card sticks out and the arrow is pointing at Claire. She avoids looking back at Ryan and his epic schlong as she reaches for it, freeing Mia to rub her breasts again.