"Danny, it's beautiful." Jazz said, unable to take her eyes off Danny's six-foot-and-growing cock.

"WHAT!?" Danny said, shocked beyond all belief. His penis was growing like an overfed weed, and here was his sister acting all casual about it!

"I must have it." Jazz said in a lustful voice. her brain had thrown all logic out the window, all she knew was that she wanted that cock.

"What do you me-"

Danny didn't finish that sentence, because Jazz had quickly taken then head of his giant cock into her mouth, sucking hungrily. She bobbed her head up and down as much of his cock as she could reach, which was getting to be less as it was still growing. At seven feet, Jazz began to insert her tongue into the slit of Danny's cock, getting a taste of Danny's semen, which was driving her wild. She then began to rub her hands up and down Danny's shaft, wanting to get as much of it in her hands as possible.

Danny didn't know what to make of all this. His cock was growing and growing, and his sister had fallen in love with it. He wouldn't, however, get to ponder this for long, because...