Wife's friend needs some special attention

One day, my wife called me and asked if I would mind her friend Steve come over this evening. She said he had called her earlier and wanted to talk to her. I said of course he could come and she told him to come over in the evening.
When I opened the door for him later that evening. I could see that he was a bit depressed. I asked him to come in and led him to the living room where my wife was waiting for him. I felt that those two needed some privacy and I left them to "work" on the computer. The office with the computer is just the room next to the living room. I let the door slightly ajar so that I could check what they were doing.
I heard them speak quietly. Something seemed to have really upset Steve. At one moment I heard my wife get up and say "Come on Steve. Let me give you a big hug!" He got up as well and she pulled him close to her body. At first, he leaned in, then suddenly, he moved back. "Shhh, it's ok!" I heard my wife saying pushing his body back against hers. "But I..." "Shhh, I know. I felt you get hard." She ran her hands over his butt pushing it closer to her body. Her head was next to his and their cheeks touched. Encouraged, Steve started caressing my wife's back and ass, pushing her hot body against his. They started breathing heavily. "You don't wear a bra! I can feel your hard nipples against my chest." said Steve. "I also have no panties." "Really?" "Check out for yourself!"
Steve's hand disappeared under my wife's skirt. He must have found my wife naked below it. His fingers were vigorously working on something hidden by the little bit of tissue. "Ahhh, yes! That feels so gooooood.", my wife was moaning in a muted voice. Her hand was on his pants stroking a big bulge within. He turned her around pushing her against the sofa. Her legs parted, he lifted her skirt and opened his pants, revealing his hard cock. With one big thrust he entered her completely as she bend over the couch. His hands entered her top, searching for her tits and he started to pinch her nipples. My wife's moans became heavier as Steve rammed his cock in her wet pussy. After a few minutes of hard fucking, Steve was so aroused, he couldn't hold it back any longer. He pulled out his cock, lifted her skirt and shot his big load on her ass and back. Then, my wife turned around, got on her knees and licked and sucked him clean smiling broadly. "Was that what you needed ? Now get dressed quickly in the bathroom before my husband sees you like that." Steve had completely forgotten about me. He seemed a bit embarrassed and quickly went to the bathroom as he had been told. My wife only smiled. She knew I had been watching them and being aroused like that would fuck her brains out later that night.