Wife discovers my hidden side

One day, my wife Mary told me she wanted to try out something with me. I should meet her at home during lunch break the next day. I was pretty curious but she wouldn't tell me what it was. I just had to wait.
The next morning, I was excited and thinking about what was coming up. Finally, lunch hour was there and I drove home, curious to see what would happen.
Mary was already at home. She was wearing a short skirt and a tight blouse revealing her cleavage. She didn't wear a bra and her nipples were poking through the tissue. She held a cord and gestured me to sit on the chair close to our couch. "I want you to watch me tease you without being able to touch me." she whispered in my ear. "Sit down on the chair and I'll tie you to it. All you have to do is relax and enjoy the show." I sat down and she started to tightly attach me to the chair, running her hands all over my body as she did so. When she was done tying me up, she grabbed me by the hair and asked me: "You like that ?" "Feels a bit strange but I'm so excited of what comes next." "You won't be disappointed, honey! Just sit back and relax!" I was so aroused, I could feel my cock getting stiff in my pants. Her cleavage was right in front of my face. I could see her boobs bounce as she moved her upper body in front of me. "Like what you see ?" "Hell yeah!" "I thought you might like this little game. Now you are my toy and I can do whatever I want with you. Does that make you feel excited ?" "Oh, yes. You make me feel so horny! How'd you get that idea ?"
Mary ran her hand over my pants, caressing my hardening member under the tissue. "Actually, I happen to stumble upon your profile on that porn site. Your profile is an interesting read." I blushed. I had never thought she might find out about that site. "But that helps me now to make your fantasies come true. I read your stories about me..." Oh my goodness! I think I know what's coming. "And your nice friend Dex ? you showed him my naked pictures that you promised to not show anybody. And he said I was so hot and you were so lucky to have me ? Guess what ? When I contacted him on that site and told him what I had in mind, he said he would love to help. Best thing: he just lives a couple of blocks away..."
With that a guy entered my living room. "Hi bro!" he smiled at me. "You're so lucky. to finally get what you always wanted... Hi Mary! Nice to finally meet you in person. You look so beautiful." "Thank you, Dex! You're so kind. You also look really handsome." Mary got close to Dex, pressing her body against his, running her hands all over his back. "Don't you think it's a bit warm in here and we should get more comfortable ?" asked Mary and striped him out of his shirt. "Wow! You do work out Dex! I like that." She dropped to her knees and opened his pants. her hand went inside and got his already stiff member out. "Wow! You are ready for the fun. And you are so big!" She kissed his cock and balls and started licking the whole length gently before taking the tip in her mouth, sucking him. "Fuck! That feels sooo good!" Dex moaned. He grabbed her head and pushed his hard cock deeper inside her mouth. She made slurping and gaging noises while she sucked his cock. She really seemed to like what she was doing.
"Hey! What about me? You're not going to let me here like this, are you ?" I complained. "Actually, that is exactly what we will do. You will stay in your chair while Dex fucks me all the ways he wants to. I promised him that he can ask whatever he wants and I won't say no." Dex' face featured a broad grin. As Mary continued giving him a bj, he started undressing her. First her top went off, revealing her naked breasts. He fondled her nipples, making her moan hard. Then he striped off her skirt and panty. "I like your little bush! I'll take care of it in just a minute!" He pushed Mary on the couch and spread her legs, plunging between them. I had to watch as He expertly licked and fingered her pussy. She moaned harder and harder and grabbed his hair pulling him close. His fingers were all over her clit and in her pussy. She was screaming as she approached her orgasm and collapsed on his face. Hi didn't just stop there but continued licking her. His moist fingers started exploring her ass. I was astonished. She never let me finger or fuck her ass. Now she moaned and slowly moved following Dex' rhythm letting his finger enter her ass deeper and deeper. "Oh yes! Dex! That feels so good! Yes, put another finger in my ass! Ahhhh!" His hard cock was throbbing with anticipation. He got off her, got out of his pants and slowly pushed his thick rod all the way inside her pussy. She moaned with great pleasure as he did so. "You're soo deeeeeep inside meeeee! Ah! Yes fuck ! Me! Hard!" He slammed his cock quickly in and out of her pussy fucking her. His hand was still on her clit. Quickly, he made her cum so hard. I had never heard her scream like that before. "I'm cumming! I'm cumming!" she screamed and had just another orgasm.
Dex now pulled out of her pussy and stared probing her ass. It was so wet from her juices, he had no problem entering her. Just a few thrusts and he was balls deep in her ass. "Your ass is so tight! I love to be in there." "It's the first time I let someone fuck it. I feared that it would hurt too much but with you it just feels soo gooooood!" With that Dex increased the speed and fucked her ass vigorously. Both moaned hard as their bodies connected.
"Where do you want me to cum ?" Dex asked Mary. "I want you to cum on my face and tits. I want to taste your juice. " Dex thrust his hard cock some more deep in my wife's ass, then he pulled out. Mary got on her knees, stroked his cock, her mouth open. The he dumped his huge load in her mouth. It was so much she couldn't keep it in her mouth and it spilled down her chin and over her tits. "You look great with my cum on your face!" "It tastes so good" She swallowed his load and sucked his cock to get the last drops of his juices. "I love the taste of your cum!"Mary said.
Then she turned to me. "Hope you enjoyed what you saw. Even if it turned me on to know you watch me fuck Dex, I prefer to fuck him in private... and be sure I will fuck him again!" With that they both left me in the living room still attached to my chair and went to the bedroom where they fucked like rabbits for hours. I could hear all their moans and screams but was unable to watch or stroke myself while watching. That was somehow frustrating for me. After a couple of hours, Dex left and my wife was so satisfied and exhausted she had to take a bath before she could untie me.