You thought you could hide those panties from me, little brother? I found them stuffed in your drawer last week, all silky and pink like some cheap whore's secret. You're eighteen now but still my baby brother, and I'm done pretending I didn't see how you looked at me when I wore my shortest skirts. Tonight you're gonna learn what happens when you steal my shit and jerk off thinking about wearing it.
I dragged you into my bedroom after Mom left for her night shift. Door locked, lights low, just the two of us. You tried to act tough until I pulled out the bag: my old bras, garter belts, a tight black dress that would barely cover your ass. "Strip," I told you, voice low and mean. You shook your head but your cock was already pushing against your jeans. I grabbed it through the denim and squeezed hard. "Strip or I tell Dad exactly what his son likes to do with his sister's underwear."
You peeled everything off, face burning red. I made you step into the panties first, the same ones you stole, stretching them over your hard dick until the head poked out the side. Then the bra, stuffed with socks to give you tits. Stockings next, rolling them up your legs slow so you felt every inch. By the time I zipped the dress up your back you were trembling, looking like a cheap slut ready to be used. "Look at yourself," I said, shoving you in front of the mirror. "That's what you wanted, isn't it? To be my little sister instead of my brother."
I bent you over the bed and yanked the panties down just enough to expose your hole.
Spit on my fingers and shoved two inside without warning. You gasped but pushed back like a bitch in heat. "Beg for it," I ordered. You mumbled something and I slapped your ass hard. "Louder."
"Please, sis… fuck me like a girl."
I lined my strap-on up and drove in deep, one long thrust that made you cry out. I fucked you raw and steady, one hand fisting your hair, the other reaching around to stroke your cock through the panties. Every time you moaned I called you by a girl's name, told you how pretty you looked getting pounded by your own sister. You came first, shooting all over my hand and the sheets while I kept slamming into you. I didn't stop until I was satisfied you understood who owned that sissy ass now.
Afterward I made you keep the outfit on while we lay there catching our breath. You whispered that you wanted more, wanted me to make you wear makeup next time, wanted Dad to catch us so the whole family knew what a feminized little incest slut you were. I just laughed and told you to get on your knees and clean me off with your mouth.
We weren't done yet. Not even close.
