[FNS-189] Annoyed Big Sister Stealthily Steals Her Sister’s Boyfriend’s Cock

I can’t believe I’m doing this, but watching my little sister’s boyfriend get hard for her makes me so fucking wet. He’s got that thick cock, and she’s too innocent to handle it. Tonight, I’m gonna steal it. I wait until they’re asleep, creep into his room, and slide under the covers. My hand finds his shaft, already semi-hard from dreaming. I stroke it slowly, feeling it grow in my grip. He stirs, moans, and I whisper, ‘Shh, it’s just a dream.’ He thinks he’s still asleep when I take him in my mouth, my tongue swirling around the tip. He bucks his hips, and I take him deeper, gagging on his length. This is my cock now. I ride him reverse cowgirl, my big tits bouncing as I grind onto his lap. He’s groaning, ‘Fuck, Rui?’ and I just smirk in the dark. My sister’s asleep next door, and I’m taking what’s mine. I squeeze my pussy around him, milking every drop of his cum. He’s panting, spent, and I lean down to lick his shaft clean. ‘Our little secret,’ I hiss. The next night, I bring my friend—she’s got a tight ass we can share. We tag team him, swapping his dick between our mouths and cunts. My sister’s clueless, baking cookies while we fuck her man senseless. I watch his face contort in pleasure as I shove his cock into my friend’s throat. He’s cumming again, and I lick it off her lips. This is better than any revenge. He’s my personal toy now, and I’ll share him with whoever I want. My sister’s gonna wonder why he’s so exhausted, but she’ll never know the truth.