I felt his hand slide up under my skirt and cup my right ass cheek. I glanced over my left shoulder and gave Dave an encouraging grin. I prefer to wear thongs, so I could feel the warmth of his palm against my bare flesh. I wiggled slightly against his hand, but not enough to make our party guests suspicious.
It was a small gathering, just three other couples. Dave and I were standing behind a Tiki bar set up in the back yard. Two of the other men were chatting on bar stools on the other side. Something about mutual funds, which I was tuning out while pretending to seem interested. I knew that the angle of the bar would prevent anyone behind me in the house from seeing what Dave was doing, so I relaxed and let him fondle me.
I love having my ass and thighs touched. The best foreplay in the world is Dave kissing and stroking the backs of my thighs and ass. It can get me so hot that I beg him to fuck me. I could feel my skin growing warmer as he caressed and squeezed my ass cheeks. It didn't take long before my pussy grew damp.
"Oh damn. Looks like we're out of ice, Lydia" Bruce said.
"I'll fill the bucket, honey" Dave offered. He pulled his hand from under my skirt. I looked back over my shoulder and gave him my best pouty face.
"Be right back," he grinned.
I sort of drifted off into a sexy daydream as the two men across from me droned on. I startled when the ice bucket thunked onto the bar next to me.
"Ah, the ice!" Bruce said, and proceeded to refill his drink.
I felt Dave's hand slide up under my skirt again. I wiggled my ass into his hand to show my approval. I leaned forward and put my elbows on the bar, which gave him easier access to my ass.
I was surprised when his fingers eased under my thong to slide up and down the crack of my ass. In the past I had tried to get him to touch me there, but he was always reluctant. Now his finger was caressing my anus. I suppressed a shudder and eased my feet further apart. My pussy was getting wetter by the second.
His hand slid down, touched the edges of my pussy lips. His finger easily parted the slippery flesh, sliding up and down over my clit.
"Ughhh..." I moaned.
"What?" Bruce asked, innocently.
"Uh...Uh huh," I said, trying to make it sound like I was agreeing with whatever inane point he had been making. Dave's finger left my pussy, now coated in slippery fluids, and returned to my anus, stroking the opening and coating it with my pussy juices. Was he going to do it? God, I hoped so. Oh, yes! His finger easily pushed into my now lubricated ass. He had never done this before, even though I had asked him to many times. I lay my forearms flat on the bar, gripping the edge tightly, and I hoped unobtrusively. I was so turned on that I didn't even care if the men figured out what was going on.
"What about you Gwen?" Bruce asked, looking past me.
Panicked, I looked over my left shoulder. No Dave. Just beautiful, blonde Gwen. Her finger sawed in and out of my ass, making me half wild with need. I stared into her grinning face, too shocked to move. I could feel my face turning red.
"Oh, I don't play the markets," Gwen said coyly. "I'm much better with people than I am with numbers."
She pulled her slick finger out of my anus. Giving my ass a squeeze and a pat, she moved to the other side of the bar and sat down. Fortunately, the guys were oblivious. Mumbling an excuse, I fled into the house. The rest of the party was a blur. I avoided Gwen completely; ashamed and terrified of what had happened. Everyone knew Gwen was a bit wild, but I would never have suspected she would do something like that.
I was still horny when we went to bed, and I threw myself at Dave. As he fucked me, his cock pounding into my very wet pussy, all I could think about was that wonderful finger fucking my ass. It wasn't long before I was cumming all over him.
A couple of days later, I answered the door to find Gwen standing there. Dave was at work, so I was alone in the house. I didn't know what to say or do. I just stood there staring at her in shock.
"Can I come in?" she asked, sweetly. "You haven't called me, so thought I would swing by."
I could feel my face getting red. I felt shame and humiliation for what she had done to me, and because I had liked it so much. I mumbled something, and she moved past me to sit down. I sat on the couch across from her, trying to control my shaking.
"Lydia, you don't have to be embarrassed," Gwen said. "You didn't know it was me. You thought I was Dave."
"Why did you do that?" I blurted out. "What made you think I would like it?"
"I saw Dave fondling your as from you bathroom window," she said. That was the only window in the house that could have seen the back of the bar. It had never occurred to me that someone might be there at the exact wrong moment.
"It was so sexy, watching the two of you," she continued. "When I came downstairs, I saw Dave was talking to Denise, holding a bucket of ice. I offered to take it out for him."
Denise is a flirt. I shouldn't have been surprised that Dave would get snared by her.
"When I saw you standing there, in that short skirt, and those beautiful thighs, I just couldn't help myself."
"But you're married!" I blurted out.
"So? I love Bruce. But sometimes I have...other desires."
"Are you a lesbian?" I asked. Oh my God! Why did I say that?
"No," Gwen laughed. "But I am attracted to women. Particularly women with a butt and legs like yours."