Senior trip Voyerism

My first encounter with voyeurism was on my senior trip.
I decided to go to California with 2 friends and stayed at Bob's uncles apartment.
We were greeted at the airport by Ted (Bob's uncle) and rode to his place drinking beer.
I was given a room to stay in, and unpacked my things.
The next day we went to the beach to swim for a while, When we got back, We were going to go to the store so I went to get my wallet from my room.
I was shocked to see a couple fucking on my bed! Embarrassed, I went into the kitchen.
Bob said "where is your wallet? we need to go"
I said "my room is being used right now!" Ted said "so what, Follow me, Ill get your wallet!
I followed him back to my room where this hot blond was riding one of Bob's friends. She was moaning and breathing very fast. She was just about to cum. We had a great view of her ass pumping this guys cock real hard. Ted smacked her ass and said "they are just fucking, Get your things" and left the room.
I saw my wallet on the nightstand, But could not stop watching this hot chick bouncing hard on her boyfriends cock. All of a sudden she starts cumming, and he said "I am cumming too!"
I could not quit watching, And started stroking my very hard cock through my pants.