I came home early from a business trip. Thought I would surprise Beth. Tiptoed in. Heard voices from our bedroom. Opened the door an inch. She was making out on the bed with a man. I didn’t recognize him. Beth usually told me she was going to have an encounter. Not this time. They kissed, caressed and snuggled. Then she licked his ass and balls, sucked his cock and got on top of him. She put his cock inside her and began grinding. I could hear them breathing hard. She started to shudder and shake and I knew she was about to come. When she did she screamed and I spontaneously came in my pants. I watched them for another half hour. He fucked her again and she came twice in rapid succession. Then she went to the bathroom and he started getting dressed so I slipped out of the house. I watched him leave, waited ten minutes and came in as if I just arrived. Beth was in her bathrobe. She seemed very excited to see me and began undressing me. We went to our bed and she made animated love to me. When we came, she continued to shower me with kisses. I went down on her. She seemed reluctant but then gave in. I tasted their juices, but said nothing. Later that night she seduced me several times. She was very aroused. She said nothing about him. I said nothing. She didn’t mention him for several years. When she finally did I played dumb. End of story.