first time doing this

One day I got out of class early and had some work to do at the sop so decided to go there instead of home first. When I walked in, I heard John fucking someone in the back so decided to go watch. I was absolutely floored when I saw what he and Joan were doing. John was fucking Joan doggy style which she and I had never done. She was completely naked as was he. They didn’t see me or hear me so I watched this fantastic fucking of my wife. I got a real hardon, shocking me. Finally they saw me right after he shot a full load of cum up her ass. Her moth dropped to the ground and John jumped up and started putting his clothe on but I stopped him. I told them I didn’t want them to stop. I couldn’t believe I was saying these things but I was totally turned on. John and Joan both asked me if I was sure and I said yes. Do you want to suck him, I asked Joan, and she just responded by pulling it into her mouth and started sucking. That did something to me and I went over and got beside her and started helping her. Soon, John had moved his dick from Joan into my mouth and I was sucking like that baby. That was the first time I had ever done anything like that but I knew I loved it. Very soon, I could tell John was about to cum and kept right on sucking. He shot a fantastic load of cum which I did my best to swallow. Joan was flabbergasted but was in heaven, she wanted me to fuck her which I did and then John did it to her again. We locked the door and fucked together almost all day.v