Not quite

The moment the first powerful pulse begins—his cock swelling impossibly thicker inside you, the tell-tale clench that signals he's about to erupt—raw panic surges through you like lightning.

"No—no!" you cry out, the haze of lust shattering as survival instinct takes over. With every ounce of strength left in your trembling body, you twist violently beneath him, nails clawing at his hips, thighs snapping shut as you buck sideways with **** ****. Your hands shove at his chest, legs kicking to dislodge him. He groans in frustrated shock, trying to hold deep, but your frantic struggle wins—he slips free with a slick, wet pop just as the first thick spurt erupts.

The hot rope streaks across your belly and mound in a messy arc, but the very tip of his cock, still pressed against your entrance for a fraction too long, releases one heavy jet directly inside before he's fully out. A single, scalding pulse floods your pussy, coating your cervix and seeping toward your cervix in a warm, potent rush—unfelt in the chaos, unnoticed amid the panic and slickness already there.

The rest follows in powerful jets over your thighs and pussy lips, painting your skin in sticky white strands as you roll away, clamping your legs tight. You scramble back, panting wildly, wiping frantically at the visible mess on the outside, heart hammering with terror and overwhelming relief. Oh my god that was close! Did I get him out in time? I'm pretty sure I got it all on me and none inside. The warmth you feel is all on your skin, dripping down your mound, belly and thighs but not seeping deeper—or so you believe.

But your brother saw it—felt it. That first spurt went inside, a thick rope disappearing into your clenching heat before he cleared your entrance. His eyes widen for a split second as he watches a faint trace of creamy white vanish between your gaped pussy, swallowed by your body. One spurt… fuck, one got in. Is that enough? Did I just knock her up anyway? Guilt and dark, secret thrill war inside him as the rest of his load spills harmlessly onto your skin. He says nothing, chest heaving, unsure but haunted by the possibility.

Your body feels betrayed, robbed of the inseminating load that your brother had prepared for you all day. You feel your pussy clench hard, sucking on - nothing. At least so you believe, while his single spurt of cum draws closer and closer to its target.

He collapses beside you, chest heaving, staring at the ceiling with tired, satisfied eyes. I'm pretty sure I got one good spurt inside her. That'll have to do. She's mine now. Better keep a low profile now and wait until tomorrow when she realizes what actually happened.

You curl up, legs pressed together, breath shaky but steadying. The fear lingers, but so does the confusing, traitorous throb of your body—unaware that a single potent rope is already working its way deeper, quietly claiming what the curse demanded.

The post-nut clarity hits both of you. You realize what just happened and how close you both got to ruining your lives. Your brother hands you a couple of wipes to clean up your sperm-covered body. There is a certain awkwardness between you now—you just had sex with your sibling for the first time... at least the first time when you were awake to feel it.

"I... think I'll take a shower and go to bed. The curse should end tomorrow morning. So unless you didn't pull out in time, you'll see your lame old brother tomorrow for breakfast," your voice sounds raspy from the moaning and screaming.

Your brother gives you a weird look and opens his mouth. He attempts to say something but then seems to change his mind: "Alright. Sorry for losing my composure. It was just...you in this body, and all this teasing. I'll sleep on the couch and see your ugly mug tomorrow."

You grab your drenched and ripped G-string and your shirt and head upstairs. Uneasy sleep and wet dreams await—your body still humming with unsatisfied need, quietly cradling the single spark that might change everything.