I caught my sons best friend masturbating in our basement bathroom. I heard some noises late at night and got up. I checked my sons room and saw his friend was gone. So I looked around and went to the basement. The bathroom was being renovated. He had headphones in and was watching a video on his phone. I could only see his shoulders up and he was just standing there watching a video. I walked down and the closer I got I could see through the the open parts of the wall. I saw his pants down and I stopped for a second and he turned towards the sink and I saw his penis. I should of walked away but I didn’t. I knew there was a place on the opposite side of the wall where he couldn’t see me but There were small holes where the sink pipes would go and I’d be able to see him better. So I moved over there got on my knees and looked through the hole and he was about a foot away from the hole. He started masturbating right in front of the hole and he must of gotten an idea because he stepped forward and there was three holes there in a two parallel to each other and one a bit lower and he must of wanted to see if his penis would fit and he put his tip on one hole. I backed away afraid he was gonna see me. He couldn’t fit it through the lower one then he tried the other two and fit it through one. He went all the into it then left just the tip in it and I could see through the other hole he started stroking it again. I was inches away from the tip of his penis that was through the hole and I watched him stroke it on the other side. I was breathing so heavy from being nervous but he had his headphones in still watching the video. I was about to blow on the tip of it and he pulled it out and switched to the hole I was looking through. I put my hands around the hole and made it like sort of “pipe” but big enough he could slip through. it came through and he had it all the way in. He was doing small pumps through the hole and leaned forward I could see precum I was about an inch from it. He stopped pumping and was just standing there so I blew on the tip lightly. He pulled it back so the tip was still there again I looked through the other hole and he started stroking it again so I went back to the tip and began blowing on it lightly. Right when I started to breath in to blow again he pushed his penis through the hole again I had my mouth partially open and the tip went just passed my lips. I opened my mouth wide so he didn’t hit my teeth. I breathed really hard and he must of felt the heat of my breath because he just kept it there and I heard him say “oh shit”. I leaned back so it wasn’t almost in mouth. He kept jerking off and I kept blowing on it. At this point I was just as into it as he was and I was getting more adventurous with it. I kept opening my mouth wide and going over his dick and blowing hot air on it. Every time I did I could tell it added to it. He’d stop and look for another video or stop so he wouldn’t cum yet. I blew it on it again while he was looking up a video I had my mouth open but the tip was basically in my mouth so I kept breathing on it and he leaned in putting his dick all the way into the hole and his tip just barely touched part of my tongue. I felt his dick get harder in my hand how I had it set on the wall and he started pumping fast. I knew he was gonna cum so I kept my mouth wide open and put it over his penis but not enough to where it’d hit past my tongue it was barely just brushing the mid part of my tongue. Finally I felt five big bursts hit the back of my mouth.