Well, the weekend eventually arrived. None of us could concentrate on work or study all week. Throughout the week, we roughly organised our plans for that Saturday: Chris would arrive at our house at 10:30 that morning, and we'd have a chat about what how this relationship would work. Then maybe we'd all go out to a nice cafe for lunch or something.
That was the plan, anyway.
To his credit, Chris did arrive on time. That wasn't the issue. The issue was that all morning, Dad and I were teasing each other, him grabbing my boobs and ass when I was getting changed, and I kept talking dirty about fucking him and my brother (I was also guilty of grabbing at his ass and rubbing his crotch). It got to be about 10:20 and Daddy had clearly had enough. He chased me around the house for a bit, eventually catching me from behind in a bear hug in the lounge room. I was giggling like crazy, feeling like a schoolgirl again. I grinded my ass against him, feeling his half-hard dick getting harder against me by the second. Dad held me in place with one arm and started massaging my tits through my shirt with his other arm.
I stopped squirming against him, looked towards the ceiling and moaned softly. I grabbed his hand and moved it down from my belly, down between my legs. He rubbed my pussy over my short shorts and kissed my neck, pressing his hard cock against my ass. "We shouldn't," I whispered. "Chris'll be here any minute, Daddy." I pointed towards the front door of the house, only a few metres behind our backs.
"He's got keys. He can let himself in," Dad replied.
I found it hard to argue with that, especially since I was too turned on to stop now. I moved Dad's hand into my shorts properly, guiding him under the waistband of my bikini briefs, down past my freshly-waxed pubic region, and down to my tingling clit and moist pussy. He lubricated his fingers with my juices and started gently rubbing my clit from side to side. I leaned back against his hard cock and warm, masculine body.
"That's my girl," Daddy cooed. He kissed and sucked at my neck. His other hand rhythmically squeezed my breasts.
"Feels so good, Daddy," I informed him. "I love your magic fingers..." I started grinding my hips again, encouraging my father's fingers to pick up their pace to match mine. God, he was so hard against me. As much as I wanted him inside me right then and there, his fingers were doing such a good job stimulating me I didn't want to interrupt. It wouldn't take too much longer before Daddy would make me cum.
"Fuck, Daddy loves you so much, baby girl. I'll never get tired of your gorgeous body or hearing your little moans," he confessed.
"I love you so much too," I moaned. I lifted my shirt and bra up so he could play with my boobs properly. His fingers were rubbing my clit pretty hard and fast now. It wouldn't take too much longer. I stared absentmindedly towards the kitchen, my eyes focused on nothing. "Feels so fucking good, Daddy. You're gonna make me cum, Daddy."
"Good girl. Cum for Daddy, Lisa," Dad groaned softly in my ear. Then he started sucking on my earlobe.
Knowing that Chris could walk in on us at literally any second now only heightened my arousal. I wondered how he'd react - shock? Arousal? Definitely arousal. I bet he'd get so turned on he'd start jacking that hard young cock of his while he watched his sister cum from his dad's masterful fingers, begging to join us, both men tripping over themselves to pleasure me.
"Oh god yes, Daddy, don't stop, I'm gonna cum," I panted, gritting my teeth, my voice almost a squeal. My orgasm made me weak in the knees, and I would've collapsed if Daddy hadn't been holding me up. I shuddered in his arms, feeling the waves of pleasure wash over me, curling my toes, clenching my fists, my mouth agape and moaning uncontrollably with delight. Daddy's fingers slid across my swollen clit over and over, slowing to a stop only when my orgasm had subsided. He slid his index and middle fingers inside me and moved them slowly in and out of my hungry, wet pussy. Fingering has never done terribly much for me and I generally stopped Dad when he'd try, but that day I just let him.
While he fingered me, I reached around behind my back and grabbed his cock through his trousers and started rubbing Daddy's dick. I unzipped his pants and was able to pull his underwear aside, liberating his thick, hard, hot cock. The tip of my father's cock was wet with precum, and I coated my palm with it and started jerking him steadily.
"That's it, baby, just like that," Daddy groaned with delight. His fingers sliding as deep inside me as they would go, then sliding out and back in. I grabbed his wrist and pulled his two fingers out of my pussy, and turned to face him. We kissed deeply, passionately, with nothing but love and lust for each other. I kept stroking his cock steadily, feeling his warmth and hardness firmly in my palm and fingers.
It was about that point that Chris arrived. He rang the doorbell three times in quick succession, as was his trademark. I froze. Even though I knew this is what Daddy wanted, and even though Chris knew all about us, I was still worried about being "caught" in the act. Daddy just held me closer and thrust his hips, sliding his cock in and out of my clenched hand, keeping his handjob going without any effort on my part.
"Keep going, Lisa," he encouraged. Then he kissed me again, not giving me the chance to argue. Instinct and horniness took over. I kissed him back, driving my tongue into my father's open mouth while I started jacking his cock again.
Chris fumbled with the doorknob, then I heard his keys jingle as he got them out of his pocket. Daddy pulled my pants down and grabbed my ass hard. I moaned softly in his mouth and kept steadily pulling on his hard, wet dick. Chris opened the screen door and was working on the wooden door. Daddy and I stayed as we were. The door swung open, and I just kept stroking Daddy's big dick. Dad broke our kiss, turned to the door and casually said, "Morning, Chris."
"Oh shit!" He slammed the door behind himself before any of the neighbours could see. "Um, hi, Dad. Lisa."
I was mortified, but since everyone else was so damn cool with the situation, I apparently had to be, too. "Hey, Chris. We were just, um, filling in time before you got here, I guess?"
He laughed. God, he really did have Dad's smile. "Fuck, don't let me stop you guys. It's what we're all here for, right?"