John decides to stay home

He tells his mom that he does not feel very good, and that he wants to stay home. John actually feels just fine, but he wants to check out what he started to discover in the shower, that his cock seemed much bigger and thicker than normal. He wonder if that weird accident in the lab yesterday could have something to do with it, but he decides to do some research on his own before he talks it over with Karen.

He gets into his bedroom and strips naked, his cock already starting to stiffen to full erection. He pulls up some of his favorite porn clips on the screen and begin to jack off as he watchs the hot blond on the screen masturbating with her fingers, thrusting them in and out of her wet pussy. He can feel his cock flow with a power it did not have before, he can barely fit his hand around its thick shaft. He rolls his palm over the fathead and his entire body tingles with sexual excitement. He realizes that he is already close to orgasm, close to blowing his load.

The woman on his computer screen is also bringing herself to orgasm and he watch her moan and thrash as her fingers press against her clit. He cock explodes; cum rocketing from it fat head as his hips buck, pretending he is fucking the woman on his computer screen. He can hardly stop the loud moan that tries to escape his throat, his orgasm is so intense he can hardly stand it He cannot believe how much cum shoots from his cock, it fires out in long streams coating the screen of his computer, running down his fist as he continue to pump his massively erect cock.

Then to his horror, he hears a sound behind him and he hears his sister say in a fierce whisper, “My god John, your cock is huge!" He spin around his hand still gripping his cock and he can feel his face burn with embarrassment and he know that his sister will never let he forget this. Then he sees that her eyes have a different look in them than her usual mocking glance. Juliet moves towards him, her body covered only by a towel. She has just finished her shower and she must have heard him moaning as he jacked off and opened the door to investigate. He realizes that the look in her eyes is desire, and he can see that her look is focused on his still rock hard cock.