All characters are at least 18 years old.
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Zach
Sunday mass was boring as usual, unless I got creative. I was sat between Keith and mom, heart thundering in my chest because of what I had planned. This was definitely crossing a line, right? But crossing lines was exactly what made it hot. I was going to hell for sure.
I clutched my stomach and groaned, catching mom's attention. "What's wrong, sweetie?"
"Stomach really hurts," I muttered.
Mom reached around me and tapped Keith on the shoulder. "Keith, can you take your brother to the restroom? He's not feeling well."
He nodded and took me by the elbow, and I picked up my backpack and let him lead me out of the nave. Before we could reach the restrooms, however, I pulled him into the confessional booth, slipping behind the red curtain.
"What the hell? I thought--" he protested.
"Nobody will disturb us during the service," I replied, reaching into my backpack and pulling out my wig. It was a tight fit in the booth, but we could still reasonably manage. Keith was still confused when I put my wig on, but his eyes bulged when I started unbuttoning my shirt.
"Zach... What the fuck are you doing?" His question seemed to die in his throat as I dropped my trousers and kicked them into the corner. Underneath my church clothes, I was wearing a light pink bikini. Not just any bikini, but one of those super small ones with very little coverage. A microkini, where my nipples were only just covered in fabric and my soft little dick was spilling out the side.
"Sinning," I whispered, turning around and spreading my ass for him, pulling my bikini bottom to the right.
I heard a zip and some shuffling, and his hands started at my chest, palming my puffy nipples and massaging them with the heels of his hands. I gasped and tried not to move under his touch, simply holding myself open while he explored me. Before moving down my body, his fingers drew a few rings around my nipples, and then they were cupping around my waist. His voice was deep and rumbly and manly as his thumbs worked the soft flesh there, and it made me wonder when I started liking when his voice got like that. Then with practiced accuracy he spat on me, right on the asshole, before he took hold of my hips and pulled me against him. The saliva made his swollen manhood glide between my cheeks with ease, and I whimpered weakly.
As he slid back and forth, I found myself wanting him to just hurry up and take me, and I realized I was turning into a slut for him. I was expecting to feel shame, but all I got was horny. My erection, which didn't seem that much bigger than when I was soft anymore, went limp as soon as I felt his tip against my anus. He began pushing inside me, and an erotic groan grew from my throat long before his crown finally popped in. I moaned with abandon as he stretched me, almost as if he was easing my tiny body onto his cock like a toy. I could tell how much he wanted me by how he was throbbing, his girth stretching me painfully wider intermittently, but he treated me with such care and slowness as he gently filled me with his meat that it was hard not to be in love with him. He knew he was hurting me and was doing everything he could to minimize it, and my growing feminine side was falling head over heels for it.
Finally bottoming out in me, I reached down and held my pelvis, feeling the slight bump of his length as it distended my body. "Ugh, Zoey..." he grunted. Heh, he still needed to think of me as Zoey during sex. I admit that I wasn't thrilled that he couldn't accept me as I was, but after all the thought he'd put into making me feel like a guy again yesterday, it was something I could live with. Especially if I got to keep enjoying this baseball bat of his.
He started moving, and neither of us could keep silent as he fucked me. I could feel his sex hitting the first bend in my guts, as if he could straighten them out given enough time. That impossibility was still incredibly sexy, and when I reached back to pull him closer in the hopes of achieving that, he grabbed both my wrists and began using them to pull me onto him as he increased speed.
"Oh, God," I slurred, my vision blurring as my eyes crossed.
Leaning down to me, he murmured into my ear, "God has forsaken us, baby. Look where we are. We're both going to hell, and my cock will be your eternal torment."
Thank you, God.