Look, I'm totally satisfied with my girlfriend. She's beautiful, smart, and just my type. I'm a fairly masculine guy, tall, deep voice, but the idea of sucking cock has been something I've been curious about for a while. Most wouldn't suspect it, but I have wondered what it'd be like to experiment, and it's one of my dirtiest turn-ons that I can't admit. To anyone. Not even her.

One day I finally make the decision to give into that curiosity. I find a guy on an app and invite him over so I can tick this off my list and find out whether I'd enjoy it or not. Only one way to know, right? Yes I know, it's terrible. I shouldn't do it, cheating is awful. Don't do it.

But I do it. He comes over to our apartment and we've gotten to talk a bit, and he ends up seated on the edge of our bed. It's a Saturday and my gf is out with friends for the next several hours. I don't expect her back for a while. We get down to business shortly after, and after some initial awkwardness, next thing I know I'm down there.. and sucking his cock. It feels super dirty having a dick in my mouth for the first time, and I can't believe I'm really doing this. I've always identified as being very straight and any of my bi thoughts are super repressed. It takes a bit of time, but I can't help but find myself getting into it and really start sucking his cock and working on him. He's moaning in pleasure while I'm going down on him and it is exactly what I thought it'd be like, and it's surprisingly hot.

This is where things take a turn though. Something comes up with my gf's friends and plans fall through, so she winds up coming home early. Neither of us hear her enter the apartment, so when she turns the corner to the bedroom, she gets to see the whole thing live and catch me in the moment. With his pants down and hard cock out in front of my face. Not only in front of my face. In my mouth even, and I am clearly going down on him eagerly. This is a total mindfuck moment for her and she can't believe what she's seeing. Her boyfriend with a dick in his mouth, right in front of her, and going down on another guy.

Much to her surprise though, she's pretty aroused by seeing it. She thought she would be so outraged to ever catch a guy cheating on her, and she probably would be flipping her shit if this were me in bed with another woman. But something about seeing me going down on a guy is the exception. She hasn't announced her presence yet and his eyes are closed enjoying the blowjob, so he doesn't notice her there outside the door yet either. She can't help but watch for another minute (or two). She's more than a little shocked at how into it I am though - her previously assumed 100% straight boyfriend, apparently polishing a guy's cock in their bedroom. Full on with the inevitable sounds from how intense the blowjob is.

At some point she knows she can't stay and watch forever though, so she finally speaks up. At the sound of her voice I realize that I'm totally in deep shit, and pull off his dick and turn. In my shock I still have my hand on his cock. It's not a good look to be caught in, this is so bad.

"No. Don't stop," she said, staring at me. "Keep sucking his dick. You started this, so... finish it?" I'm totally at a loss for a moment and staring at her. There's no way I can even react to what she's saying, and I'm sure she knows. But she gets a little impatient and steps into the room. "Do you need some help? Let me show you how it's done then," she says all of a sudden and walks up to us while putting her hair up in a ponytail, then gets down on her knees next to me. I'm staring at her the whole time in shock.

It's my turn to be totally blown away by her response, and so is he. "If you got to do this, so do I," she says and grabs his cock, then parts her lips and starts blowing him right next to me. I can't help but watch her while she's working him, and she's staring back at me too. She keeps at it for about a minute before pulling off to ask, "So are you going to help me with this or not?" while holding it out, like an offer.

At this point there's no backing out of this situation. It's totally fucked. So I look at her and roll my eyes, then lean in and take her up on it, and take him in my mouth again. She watches me blow him for a minute, then joins in too and we're sucking his cock together. He must be in a mix of shock and heaven at having this turn into a couple blowing him, and we wind up sucking his cock together until he loses it and hard. She takes it on her face like a champ and we kiss each other, then we can't help but suck on him together again one last time for a minute or so before wrapping things up.

He pulls his pants up and leaves, and we definitely have a lot to talk about later and sort out. But funnily enough, I'd say this indiscretion may be forgivable in her eyes.