“Just let me grind my cock against you, that’s all I ask,” I pleaded as I caught sight of her exposed thighs and the delicate edge of her lacy knickers. She hesitated for a moment but finally relented, pulling her underwear down just enough to create space for my throbbing cock to slide against her.
“I swear, you better keep this to yourself, you pervert,” she warned as she stood before me.
“God, you’re so wet, I can feel it seeping through the fabric,” I gasped as I admired the sight of her bare mound teasingly revealed beneath her knickers. My cock twitched in anticipation of rubbing against her delicate clit.
“I may be your sister, but I’m still a woman,” she reminded me, pressing her bare pussy against my crotch. “Does it feel good, Andy? I can’t believe my brother, the perv. You owe me big time.”
I couldn’t find the words to respond; all I could do was let out a guttural groan as my cock ground against her clit, the friction intense and intoxicating. She moved her hips in a sensual dance, grinding herself against me as my hands found their way to her t-shirt, peeling it off to expose her erect nipples.
“Hey, I didn’t say you can take my top off,” she said shocked.
“Come on, sis, it will help me cum more,” I said as my cock grinding just under her pussy, it wouldn’t be long until I painted her panties white.
She sighs and unclasps her bra, “There, this might help.”
I squeezed her tits while still pumping away, “Unnngh,” I couldn’t hold back as I shot a thick creamy load which landed on her panties.
I continued to massage her swollen pussy mound as my sperm dribbled onto the lacy material. Her body stiffened in response, followed by a series of ecstatic trembles. My fingers lingered on her throbbing clit for a few more moments, relishing the heat that radiated from her freshly defiled mound.
“This better stay between us, or I swear I’ll fucking kill you,” she whispered as she looked down at the mess in her panties.
“Fuck sake these were clean on, I can’t believe you just did that,” she muttered, looking at the white lumps and streaks of cum inside her lacy underwear.
“Just pull them back up,” I chuckled.
“No, there’s a pool of spunk in them that’s disgusting; I ain’t wearing them now.” She said as she took them and her shorts off.
“You can lick it off, why not?” I teased.
She giggled nervously as she tossed her panties at me. “This is your mess to deal with, big brother. Make sure you clean them up good.” I grinned as I took her knickers in hand, feeling the warmth still radiating from them — and the thick glob of semen that had seeped through, as I went to put them in the washing machine.
