This started when I moved into a new apartment building and met the couple who live over the hallway. They would invite me for dinner and helped me set up my apartment. I became close with them especially since they understood sign language. After a few months of living there is when it started. I was over at their apartment and helping dry up when Lisa (not her real name) started grabbing at my crotch. I thought she was just being silly but she backed me up until my back was against the counter. She dropped to her knees and proceeded to undo my trousers, removing my boxers and started playing with my cock. She teased me and I was confused and panicking since Tom (not his real name) was in the apartment. He eventually walks into the kitchen and just stands there watching for a while, smiling. She continued to play with my cock before stopping and Tom came towards me. He let me know they have an open relationship and they love sharing a person and asked if I wanted to be that person. I was unsure so we decided to have some fun that day and see how I felt.