It's just a little ity bity secret.
I heard the drawer of her nightstand open. I concentrated on licking her delicious pussy, savouring each wonderful moment of being allowed to perform cunnilingus on my incomparable little sister.
"Mmmm, good, keep doing that," she sighed. "Now let's see if we have some icing on this cake..." She held a white object in front of my field of view, and I focused my eyes on it. It was another baby monitor, which she switched on. "Does this make me evil?" she asked as crackles of white noise emitted from the device.
I glance up quizzically to her eyes, which returned a mischievous gleam. Hisses continued to emanate from the monitor, and I began to probe my little sister's vagina, spearing her inner folds with my tongue.
A crackling sound and a rustling came from the speaker. I was confused, so I just continued tongue-fucking Karen and dragging my lips across the outer folds of her pussy.
I heard a breath and what sounded like a soft sigh from the monitor. What were we tuned in to? It had to be Marisa's bedroom... Had Karen hidden a monitor in Marisa's room? Holy shit, you devious little freak!
Sure enough, Marisa' voice came through the speaker. "Mmm, yeah..."
"Jackpot," whispered Karen with a huge grin. "Keep listening. I've been batting a thousand so far, keep listening..."
"Oh..." gasped Marisa softly. "Yes. Mmm, yes you are. You know you are."
More soft rustling and white noise came from the speaker as I strained breathlessly to hear more. I kept my tongue motions slow and even on Karen's vulva as she enjoyed being softly eaten out and listened in too.
"You've always been. It's you, Daddy, you're the one. You've always been the one..."
Karen looked down at me wide eyed with a triumphant smile. She pointed at me knowingly and broadened her grin and raising her eyebrows. I couldn't believe what I was hearing. This day had already been utterly too much!
"Mmm, yeah," Marisa's voice softly rasped. "I know, I know. I want to see it. I want to see it."
I stopped dead and Karen and I just looked at each other in amazement, both silently hanging on with bated breath at each sound that emitted from the speaker on the monitor she held.
"Oh, Daddy, it's so big, it's so big. Oh, Daddy. Please, please, I want it..."
She gasped and let out a little squeak. "Mmm yeah! Oh, Daddy, please... Please, I want it. I know. I know. I don't care. Please, I want it. Put it in, oh please Daddy."
She let out a low moan and a sound of sheets sliding came through. There was a pause. "Fuck me, Daddy."
My mind was blown into the next galaxy and I realized that my cock was once again standing at rapt attention. Oh my fucking sweet holy god!! Karen was right about everything! And my daughter was masturbating just down the hall, fantasizing about getting fucked by me and calling my name!
"Oh, Daddy," she moaned. "It's so big, it's so big! Give it to me, please, I want more. Oh, Daddy, oh, Daddy, fuck me!"
My cock throbbed painfully as Karen silently slid down my body. She positioned her moist petals at the tip of my dick, adjusted my member with her hand, and began sliding down my pole. I was in a state of shock or something. This was unprecedented, unforeseen, incredible, naughty and sexy beyond my wildest dreams.
"Fuck me, Daddy. No, don't stop, I want more. No, don't take it out. No. More. More. Deeper. I can take it. Please Daddy, I'm not scared, I can take it. It feels so good. Oh, Daddy, it feels so good. Fill me up."
Karen began to ride my cock as we beamed at each other, slack jawed in utter amazement and lust. I had never heard anything as arousing ever. Karen was flushed and obviously completely turned on too.
I heard Marisa's breath quicken and rustles of motion. Her voice was still hushed, but more insistent and intense. "Ooh, yeah, ooh, yeah, uh huh, yeah. Fuck me! Fuck me, Daddy. Ohhhh yeah, you're so big, you're so good, oh, it's so fucking good. Oh, harder. Harder, Daddy, I'm gonna cum!!"
My mind was almost orgasming with incredulous intoxicating overstimulation.