Mark just sits there, alone in the room now that both parents are gone. He's not sure what had just happened but he knows it's something about him.

"I'm going up, Mark. Come when you're ready."

His mom's last words replay themselves in his head.

Does she wants him to do it again?

Despite it being so wrong, that it already may be causing problems between her and his dad, he can't help but feel a shiver of anticipation run through him as he remembers the other times.

"No, it's mom!" He says to himself half-heartedly, his groin tightening.

But he has to do it.

For some reason, it doesn't seem as bad as it has done.

Taking a deep breath, the boy gets up and goes upstairs, pausing outside his bedroom door as he ponders about double checking with her.

Deciding that he heard right the first time, he goes in and quickly strips down, noticing that his penis is already fully erect. Squirting some cream onto his hand, he gently rubs it into his now throbbing tool, gasping slightly as the cool lubricant comes into contact with his hot flesh, making him harder still.

Putting on his robe, he quickly notices that he is sticking out like a third arm. Embarrassed that his mom may see it, he quickly folds his hands over, causing the bloated shaft to press against his stomach.

With his 'condition' hidden, he nervously approaches his parent's bedroom door...