Trish closed her eyes and moaned softly as her fingers worked the lotion into her sensitive flesh. She reached over and got more lotion, then quickly took the top off the bottle.
She leaned back, thrusting her breasts toward the mirror and me as she poured a liberal ribbon of lotion over her swollen tits. She thumped the bottle down and returned to rubbing lotion all over her boobs, teasing her stiffened nipples and moaning all the while.
I had a throbbing hard-on and muttered a quick wish that nothing would interrupt us until we both came. Trish was panting and stopped feeling herself up to pop open the button of her jeans. She slipped one hand in and began rubbing between her legs with it while rubbing her breasts with the other. The zipper crept down some, but caught part way.
"I wish she'd take it all off." I muttered, sliding a hand into my pants and fingering myself.
Trish abruptly pulled both hands away, grabbed her jeans and shoved them down off her hips before kicking them into a corner. She skimmed some lotion off her tits and proceeded to rub it into her pussy, her soft moaning giving way to panting and louder yelps of pleasure.
I stumbled down the hall and wished the door unlocked. Trish turned as I stepped into the bathroom, but didn't stop rubbing her tits and snatch.
"J-Joey? she gasped "What?" her eyes widened as I let my jeans fall and she saw my hard-on.
"Spare some lotion Sis?" I stepped over to her, my fingers sliding up and down my shaft as I went.
Trish seemed mesmerized by the bobbing head of my penis and didn't react until I reached over and began fondling one of her breasts along her.
"Hey! You, we shouldn't.." Her voice tailed off as I took her hand and guided it down to my shaft. She clung to it, her fingers wrapped around my throbbing flesh. I put both my hands on her breasts and began gently tweaking her nipples.
Trish moaned again and her hand began pumping my cock almost against her will. Her other had made soft squelching noises as her fingers slid in and out of her pussy. I smiled as I realized she was pumping us both at the same rhythm. She looked up at me with equal parts fear and desire. "Oh Joey, I can't stop! I can't--" she broke off as I stepped forward and kissed her. Her mouth opened under mine and I discovered that Trish excelled at french kissing.
By now my hands were kneading her ass and my cock was pressed against her belly. I crouched down and as I straighted she whined and guided the head of my phallus between her legs. The lotion and her own lust had her liberally lubed and I slipped in without any problems.
I grabbed her waist and lifted her to sit on the edge of the vanity. Her legs were wrapped around me, heels pulling as I thrust into her. Her arms were around my neck and we exchanged passionate kisses. I was holding her hips, keeping her from slipping off the counter or back into the sink. Her tits were pressed against me, rubbing up and down with each thrust.
"Oh god joey, don't stop! Don't stop, faster!" Trish panted, her head on my shoulder as I rammed into her again and again. She was clenched tight on my shaft and it felt like there was electricity running up my spine.
Trish shrieked as her orgasm sent waves of pleasure throughout her body. I kept thrusting as she leaned back limply. I rubbed my face against her massive tits and hooked my arms under her knees. As I pulled them up she leaned back further, gathering her tits in her hands and raising them to my questing lips. I took one of her nipples between my teeth and gave it a quick bite.
Trish yelped and her muscles tightened involuntarily. I buried my shaft as deeply into her body as I could and felt a sudden heat run down my spine and up the shaft of my penis. The clench and release as I ejaculated into my sister's most secret, intimate place had me moaning and gasping for breath. Trish's eyes widened and she let out a strangled cry as she had a second orgasm, her tense flesh reacting to the stimuli thousands of years of evolution had bred her to desire; the sensation of a man filling her with his seed.
When I was empty I stayed standing with my cock inside her. She looked up at me wonderingly.
"I wish it'll be at least as good as that every time we have sex." I said to her. "And I wish we have sex together a lot!"
I felt a tingling as the wishes took effect. Trish looked up at me and licked her lips "Any time you want me Joey, I'm yours!" she said huskily then rubbed her sweaty tits against me before frenching me some more.