You sit up in bed. You're not breathing. You're waiting. Perhaps you didn't hear those moans. Perhaps your mind is playing tricks on you. Perhaps you were actually dreaming. A few seconds pass and you hear nothing.
Then it happens again. You hear a deep moan. You get out of bed. You walk towards the door. You open it and stick your head into the hallway. You turn towards the guest room and you hear yet another moan. This time it's your wife. It's coming from the guest room. There's no question two people are in that room moaning. You wonder if it's possible that your wife is somewhere else entirely and that your brother somehow snuck a woman into the house. You know it's not true, but some part of your mind doesn't want to confront the possibility that your wife is actually fucking your brother.
You can't help but walk down the hallway and towards the guest room. It's as if your body is compelling you to do so, despite your mind feeling fearful of it. The moans get louder as you approach. Then you hear the bed squeaking just a little. It's the same bed you and your wife used to sleep in before you upgraded to a king size. You remember those squeaks. You remember how it used to make that noise when you fucked her. Now you're almost certain your brother is fucking her.
You're standing outside the door. There's no question sex is happening in the guest bedroom. The sounds are unmistakable. They're not even trying to be quiet. Either they think you're not going to hear them, or they don't care.
You reach out and wrap your fingers around the door handle. Your heart is pounding. Your senses have come alive, and while you're trying not to think about it, you're a little bit turned on.
You turn the door handle silently. You apply gentle pressure and the door opens a crack. It's dark in the room, but you can see two figures in the bed. You can't be absolutely certain it's your wife on top of your brother, but you know there's no real chance it's anyone else. You know your wife is sitting on his cock. You know she's riding him. You know that's her ass bouncing. You know those are his hands on her tits. You know that's her hair swaying gently from side to side as she offers the pleasure of her pussy to your brother.
"Your cock feels so good inside me," your wife says, shattering any illusions you might have had about someone else being in the guest room with your brother.
She leans down and kisses him. It's a passionate kiss. He grabs her ass and fucks his cock up into her pussy. The minimal light in the room hits his shaft and you can see that he's not wearing a condom. Your wife is fucking your brother and she's letting him bareback her.
Your dick is hard now. You can barely think straight. You know you shouldn't be turned on, but that knowledge hasn't prevented you from getting massivevly aroused as you watch your wife cheat on you.
"Fuck, I can't believe how good this feels," she says.
"I'm close," your brother replies.
"Me too," your wife says hurriedly. "Cum inside me, Ben. Cum in my pussy."
You slip a hand down the front of your underwear. You stroke your cock as you watch your wife ride your brother's cock. You witness their passion. You get off on the illicit nature of what they're doing. You know you shouldn't, but it's just so fucking hot.
"I'm cumming," he declares.
Your wife moans in the way she always does when she cums. She's cumming on your brother's cock, only it sounds a little different than when she cums on your cock. It sounds like she's enjoying it a little more. You very nearly cum in your underwear, stopping your vigorous stroking right before you spill your load.
"Wow," your wife says as she collapses on top of him. She turns her head towards the door and you freeze. It's pitch black in the hallway so you're fairly certain she can't see you, but your heart is pounding. "That was incredible," she adds. "That was...I don't know...that was..."
"That was really good sex," your brother finishes her thought. "Really, really good sex."
"Yes," your wife replies. "But we can't do it again. I mean, we just can't."
"No, of course not," your brother replies, but you can hear that he doesn't really mean it. He wants your wife again, and you suspect he'll do anything he can to have her again.
You don't want to get caught watching, so you back away from the door and tiptoe back down the hallway. You slip into your bedroom and under the covers, but sleep won't come. Every time you close your eyes you see your wife riding your brother's cock. You hear her moaning. You hear her cumming.
Fifteen minutes pass before she returns to the bedroom. You close your eyes and pretend to be asleep as she slides under the covers. You're not sure, but for some reason it feels like she's watching you.
Then she moves closer. She cuddles up next to you. You feel her bare breasts against your chest. She reaches up and runs her fingers through your chest hair before slowly moving towards your crotch.
She kisses your neck and slips a hand into your underwear. You open your eyes and turn towards her. She smiles and asks, "Did you enjoy watching me fuck your brother?"
Your pulse instantly races. Can you admit to something like that? Would that be insane? Does it even matter, given that your dick is already hard in her hand?
"Would you like to fuck me?" she asks. "Would you like me to ride your cock just like I rode his?"
"Yes," you admit.
She smiles, pulls your underwear off, and climbs on top of you. She takes your cock inside her. Her pussy is hot and sloppy around your stiffness. "Does my pussy feel good?" she asks.
"Yes," you admit.
"Do you like fucking my pussy after your brother had his way with me?" she asks in a voice laden with intense lust.
You're already close to cumming. You nod as an answer to her question and she puts her hands on your chest and uses the leverage to ride you faster.
"Should I let him have me again?" she asks. "Should I let your brother fuck my tight pussy as much as he wants while he's here?"
"Yes," you answer. It's insane, but you can't help it. You utter the word, giving your wife permission to cuckold you with your brother over and over again, and the moment you do so you cum inside her. You groan loudly and she puts her hand over your mouth to keep you quiet while she continues to ride you, milking every last bit of pleasure from your cock.
She leans down and kisses you as your orgasm subsides. "I saw you watching," she whispers. "I'm glad you enjoyed yourself."
You wrap your arms around her. You don't say a word, but it feels nice to hold your wife tight and bask in the warmth and pleasure of a truly spectacular orgasm. You can't help but wonder if she's going to keep fucking him, but that's a question for tomorrow.