Betrayed by my Husband, So I Took His Sister

My back slammed against the cold metal door of the bathroom stall as I crushed my lips against Claire’s.

The kiss was hungry, almost violent, like we’d been starving for each other all morning. Her strawberry lip gloss mixed with the faint taste of coffee on her tongue.

My hand was already under her short plaid skirt, fingers slipping past her soaked panties and pushing deep inside her tight heat.

“Mikayla…” Claire whispered breathlessly against my mouth. Her voice was shaky, needy. “Please… I need you so bad.”

I groaned softly and curled my fingers, stroking that sweet spot I knew drove her crazy. “You’re dripping for me already,” I whispered back, my lips brushing her ear. “Been thinking about this since first period, haven’t you?”

She nodded fast, her breath hot against my neck. “Yes… all morning. Your fingers… God, just like that. Don’t stop.”

I didn’t. I pumped my fingers faster, deeper, while my thumb circled her swollen clit.

Claire’s hips rolled against my hand in desperate little movements. Her fingers gripped my shoulders tight, nails digging through my shirt.

The bathroom was quiet except for the wet sounds of my fingers moving inside her pussy, and our heavy breathing.

This was our thing, stealing these moments every break time. No one on campus knew that perfect, straight-A Claire was secretly hooking up with me in bathroom stalls and behind the old gym building.

I loved how she melted for me. Loved the way her moans turned into these soft, broken whimpers that made heat pool between my own legs.

I kissed her harder, biting her bottom lip gently as I added a second finger. Claire’s walls clenched around me, hot and slick.

“Faster, Mikayla,” she begged in a whisper. “I’m so close already…”

Just as I was about to give her exactly what she wanted, the main bathroom door burst open with a loud bang. Voices and laughter flooded inside.

Multiple pairs of shoes clicked across the tiled floor. My heart jumped into my throat.

I froze for half a second, but Claire’s hips kept rocking against my hand. She was too far gone. I quickly covered her mouth with mine, kissing her deep and hard to swallow any sounds.

My fingers never stopped moving, slow, deep thrusts now, curling with every stroke. The risk made everything feel ten times more intense.

Claire whimpered into my mouth. The sound was muffled, but it still escaped.

“Did you hear that?” one of the girls asked suddenly. Their conversation stopped.

My pulse raced. I pressed my body harder against Claire’s, pinning her to the wall. I kissed her even more aggressively, my tongue sliding against hers while my fingers kept working her.

In and out. Faster.

My thumb pressed firm circles on her clit. She was trembling against me, her thighs shaking around my hand.

“Hear what?” the second girl said.

“I swear I heard moaning. Like… someone in pain or something. It came from the stalls.”

Claire’s breathing was frantic. Her eyes were wide and glassy as she looked at me, silently begging. I didn’t stop. I couldn’t. I rubbed her faster, feeling her clench tighter around my fingers. She was right on the edge, and the danger of getting caught only made it hotter.

The first girl laughed. “You’re imagining things again, Macy. Maybe it’s just the AC making weird noises. Or someone’s stomach acting up from the cafeteria food.”

“Yeah, probably,” the other added. “Anyway, back to the party. I heard Mia and Tyler hooked up last week. She said he was terrible in bed.”

Their voices continued, talking about crushes, weekend plans, who was dating who, and complaints about classes. All while I was knuckle-deep inside Claire, kissing her like my life depended on it. Sweat started beading on my forehead. Her body was burning hot against mine.

I pulled back just enough to whisper against her swollen lips, “Come for me, baby. Right now. But stay quiet.”

Claire nodded desperately, her eyes fluttering. I thrust my fingers faster, curling them perfectly while rubbing her clit hard. Her whole body tensed up.

Then she shattered. A muffled cry vibrated against my mouth as she came hard, her walls pulsing around my fingers.

I kept moving through every wave, drawing it out until her legs turned weak and she sagged against me, panting heavily.

The girls outside kept chatting for another minute before they finally finished washing their hands. Their voices faded as they left the bathroom. The door swung shut with a loud click. Silence returned.

I broke the kiss slowly. Both of us were breathing hard, chests rising and falling fast. Sweat glistened on Claire’s flushed cheeks and neck.

Her lips were red and puffy, her eyes still hazy with pleasure. She looked so beautiful like this, completely wrecked and glowing because of me.

“Fuck, Mikayla,” she whispered, still trembling in my arms. “That was way too close. I thought we were done for.”

I smiled and gently pulled my fingers out of her. I brought them to my lips and licked them clean, tasting her. Her eyes darkened as she watched.

“Totally worth it,” I whispered back. “I love how you fall apart for me.”

Claire let out a soft, breathless laugh and pulled me in for another kiss, this one slower and sweeter. Our hearts were still pounding.

I could feel the dampness of her skin against mine, the way her body was still shaking slightly from the aftershocks.

We stayed like that for a few more seconds, holding each other tight in the tiny stall.

The bell for the next class would ring soon, and we’d have to slip back into our normal lives like nothing happened.

But right now, in this stolen moment, she was mine and I was hers.

No one else had to know our secret.