One of the great things about jerking off in the sauna was I never needed to bring any lube; I sweat so much in there that my perspiration acts as a lubricant all by itself. I sat back down on the bench and opened my knees, giving Val a perfect dead-on view of my d**k and scrotum. I reached down, grabbed my shaft just under the head, and started stroking. She watched me, enthralled, as I gently pulled my prick, spreading my legs even further. I looked up frequently to see my sister's reactions; I noticed right away that her breathing had gotten heavier. I was trying to put on a bit of a show for her initially; but soon lost myself in the pleasure of jacking my fat c**k. My toes started to curl, eyes rolled back in my head, head thrust back...knowing Val was watching me made this the best s
