Watched by Teenager

I have mentioned that my wife is a hot little Blondie. She loves to make out a few times a week where possible. We had a busy week  and didn’t get much time to hop in the sack together with some meetings and shift work. We also had our foster son Tony staying for the night He was 18 dark haired and cute looking, popular with all the girls.  During the evening meal it was obvious that my wife wanted sex when we were due to  retired to the bed room,  In the meantime we needed to be mindful that Tony was with us.. We all sat in the lounge area to watch a movie.  My wife snuggled up and Tony sat next to us in a armchair.  Our younger daughter was  already sleeping. It was cool so we put a blanket over us. I soon felt my wife’s hand brushing my nipples. I was getting hard and was thankful for the blankets cover .My cock is 8” but very thick so when i crack a bone it is obvious. She soon found it and slipped her hand in my track pants.  I saw Tony glancing at us a few times. He looked to have a sizable bulge, but he was really well hung so it may have just been his normal crotch.  I soon felt my balls tighten and stopped the wife’s hand work.  We excused our self saying how tired we were. I gave my foster son a wink as i held the blanket in a position to hide my huge  and now leaking cock.  We were in the process of buying fittings and curtains had not been a part of our budget for the past 2 years. Out in the country we didn’t really need them. I turned on the wardrobe lights because we both loved to see ourselves having sex.  When my wife wants sex she can be quite aggressive. As I locked the door she ripped my clothes of and started sucking strongly on my nipples.  I was skilfully undressing her at the same time. She pushed me on the bed and started to lick and suck the head of my cock. I caught some movement in the mirror that reflected the corner of the window. A flash of blue!... We had a spectator. Tony had slipped outside and was checking out what we were up to, his blue t shirt was obvious. I almost shot a load at that point but knew she would never suck my cock again if i did so.   I pulled her off and climbed back on the bed. I let her work her way up to kissing me and she skilfully held my manhood as she lowered herself onto it.   I started pounding up into her as she collapsed on to me in orgasm . We rolled over and i pumped to a  shattering climax. I was thinking about how our peeping tom was enjoying the show.   A short while later  as my wife showered i snuck out the front door. Tony was in bed  but i found  4or 5 splashes of fresh cum on the concrete near the corner of our window. It seems he did enjoy the show after all .