A helping hand from your 'sister'

Two minutes later, he heard foot steps and what looked like his hot 18 year-old sister walked into the room. In one hand she held the RAR which she quickly deposited on a table.

"Jenny!? What are you doing here?", but Jenny immediately knelled down in front of his cock and balls.

"Son, it is my firm belief that those nasty women should make our dicks hard, not our lives! That, together with the fact that Jenny's scan was the only other one I had, I will give you a jump-start!" the apparent Jenny said in his father's manly voice.

"Woah! Dad, that is awesome!" Jim beamed happily.

"Yeah, but don't mention this to your real sister, or anybody else for that matter! And now..." she procured a small blue pill out of her pocket and handed it to Jim. "Take this, it always helped me in these kind of situations.".

Immediately Jim grabbed it.

"Viagra? You are the best Dad ever!" Jim said and gulped it down.

"What? I did not even start yet!" the apparent Jenny chuckled and got hold of the dangling dick in front of her.

"Feels not so limp actually! A handjob could suffice, though a blowjob would be optimal and more effective to get you up to snuff, plus you won't have to hear my manly voice then..." Dad commented.