The slurping sounds of my wife sucking on Todd’s cock were coming more regularly. Both my wife and he had been constantly moaning low and soft. I heard Todd make a grunting sound, the sounds of my wife’s movements had stopped, and I wondered if she’d made him cum… if he’d cum in her mouth or if she’d pulled him out of her mouth at the last minute. The thought of Todd’s cum all over my wife’s chest, dripping over her pale breasts only served to heighten my arousal… and then I panicked. My sister-in-law was still sitting naked behind me, fingering herself and jerking my cock. My wife was about to walk through the door and catch us.
I struggled against my sister-in-law, trying to stand, trying to get my cock back in my boxers, but even as I was buttoning my boxers I knew there was no way to conceal my raging hard-on. Looking back at Laura I was panicked, but she was still kneeling on the bed using both hands to finger her pussy and rub her clit. I heard a door open… but to my surprise it wasn’t the door to the bedroom I was in with my sister-in-law. Instead it was the door to the master bedroom, and then through the adjoining wall I heard the door close and lock.
Had my wife and Todd just gone into the master bedroom? Had they locked the door too? I couldn’t figure it out. Maybe Todd had gone into the bedroom and my wife was even now coming down the hall to come into the guest bedroom. I peaked into the hallway to see what was happening. Again though my hopes were dashed. My wife’s red bikini top and bottoms where laying in the hallway right outside the door to the guest bedroom along with Todd’s swim trunks. That’s when I heard my wife’s voice and Todd’s voice come muffled through the adjoining wall, I couldn’t make out what they were saying, but they were both in the master bedroom. There were sounds of them kissing as they moved across the master bedroom. Again I sank back onto the bed in despair. How much longer was my wife going to be a victim of this horrible set-up that my sister-in-law and boyfriend had engineered?
There was a squeal of excitement from my wife, then the sound of someone crashing onto my sister-in-law’s bed in the next room, followed closely by the sound of some-one’s knees hitting the floor. I was surprised by how clearly the sounds travelled through the wall. Second later my wife started moaning again and I could barely make out a slurping, sucking sound. Todd had my wife down on the bed and was eating her pussy for the second time tonight. My wife never let me go down on her after we made love and she didn’t kiss me after giving me a blow job. That must have meant that Todd hadn’t cum inside of her. When they were fucking out by the pool he hadn’t been wearing a condom, ‘there’s no way my wife would let a strange man cum inside her… and then go down on her… would she?’, I thought. It was becoming clear to me that I didn’t really know what my wife was capable of, this evening had proven that.
At the sounds of her sister getting eaten out Laura fingered herself to orgasm, cumming loudly, rocking on the bed causing it to squeak. I could hear my wife’s moans intensify from the other room. The two sisters were audibly feeding each other’s sexual hunger through the wall. ‘Wait’, I thought, “does my wife think that I’m fucking her sister? Does my wife know that I’m not doing anything? That it was her sister getting herself off”. I didn’t know what to make of anything anymore.