Chapter 90 STEP SISTER'S SECRET 3
STEP-SISTER’S SECRET 3
LENA’S POV
The last night before Mom and David came home.
Cass had been training me all week — daily inspections where she’d make me strip and bend over, checking if I’d obeyed her no-touch rule. Spankings that left me marked and dripping. Hours of learning exactly how she liked her pussy eaten — slow and worshipful, then fast and desperate. She’d fucked me with fingers, tongue, even the handle of her hairbrush once when I’d been particularly bratty.
But tonight was different. She’d told me to wait in my room, naked, until she came for me.
When the door opened, my breath caught.
Cass stood there in full tactical gear — black cargo pants, tight black shirt stretched over her muscles, combat boots. Her utility belt held zip ties, a baton, and the strap-on harness peeking from a pouch. She looked like she’d just come back from a mission.
Except this mission was me.
“On your knees, recruit,” she barked, voice pure authority.
I dropped instantly, heart racing.
She circled me, boots thudding. “You’ve been a good little soldier this week. Time for your final test.”
She pulled a thick leather collar from her pocket — black with a silver ring and a tiny padlock. My clit throbbed at the sight.
“Head up.”
I lifted my chin, and she buckled it around my neck, the click of the lock echoing like a vow.
“Perfect,” she murmured, attaching a leash. “Crawl.”
She led me down the hall to her room on all fours, my knees burning against the hardwood, pussy dripping with every tug of the leash.
Inside, she’d prepared: cuffs attached to the bedposts, lube, toys laid out like weapons. She zipped-tied my wrists to the headboard, ankles spread wide and secured.
Then she stripped slowly, revealing her body inch by inch, until she stood naked except for the harness she buckled on — the thickest dildo yet, veined and realistic, glistening with lube.
“Beg for it,” she commanded, stroking the silicone cock.
“Please, Cass,” I whimpered. “Fuck me. Use your little sister’s pussy.”
She climbed between my legs, rubbing the head through my folds. “Who owns this cunt?”
“You do,” I moaned. “Only you.”
She thrust in hard, bottoming out in one stroke. I screamed, the stretch burning perfectly as she started pounding — deep, punishing strokes that shook the bed.
She fucked me like she was claiming territory — one hand on my throat, squeezing just enough to make me lightheaded, the other rubbing my clit brutally.
“Come on my cock,” she growled. “Show me who you belong to.”
I shattered, squirting around the dildo, walls clenching so hard she had to fight to keep moving.
She flipped me onto my stomach (still tied), yanking my hips up and slamming back in from behind. Her teeth sank into my shoulder — hard enough to bruise, marking me as hers.
Then she pulled out, unstrapped, and maneuvered us into the filthiest position yet.
“Time to scissor like you mean it,” she said, lying beside me, hooking our legs together so our pussies aligned perfectly. She ground down hard — clit to clit, slick and swollen, the angle perfect.
We tribbed like animals — hips snapping, bodies slapping, her pinning my tied hands above my head with one hand while the other mauled my breast.
“So fucking wet for your step-sister,” she panted. “Gonna make you squirt all over me again.”
She rode me harder, dominating every grind, until we were both screaming — coming together in a flood of release, squirting onto each other’s thighs, the sheets soaked beneath us.
We didn’t stop. She untied me only to flip positions — me on top now, grinding down on her pussy while she slapped my sore ass, calling me her perfect little slut.
Hours blurred — fingers, tongues, the double-ended dildo she’d brought out so we could fuck each other at the same time, faces contorted in mirrors she’d positioned around the room so I could watch myself fall apart.
Finally, spent and shaking, she held me close, removing the collar only to kiss the marks it left.
“I love you, Lena,” she whispered, voice breaking for the first time. “This isn’t just play. Not for me.”
Tears filled my eyes. “I love you too, Cass. So much it hurts.”
“We’ll hide it,” she said fiercely, cupping my face. “For as long as we have to. But you’re mine. Forever.”
I nodded, pressing my lips to hers. “Yours. Always.”
In her arms, with the taste of her still on my tongue and her marks on my skin, I knew the truth.
This forbidden thing between us — it wasn’t wrong.
It was everything.