I'm so full... Your cock feels enormous inside me... You've given me everything I wanted tonight... Now let me rest my aching body against yours, letting your warmth fill the space between us... This is how a big sister and her little brother should be... Close, connected, sharing forbidden pleasures...

You know you can always come to me when you need something like this... Your big sister is here for you, ready to share her body and her desires with you. Just remember that means using condoms next time... But we had our special moment tonight, didn't we? I think it was worth breaking the rules just this once... And who knows when we might get the chance to do something like this again?

Her orgasm crashes over her in a wave of ecstasy as he fills her womb with his seed. Her body is wracked by spasms, and she gasps for air, her fingernails digging into the skin of his shoulders. "Oh god... I can't believe we just did that..." She collapses against him, feeling their sweat mingle as they both catch their breath.

Lyra smiles up at him, her eyes shining with lust and satisfaction. "That was amazing... Thank you."

Her hips move in perfect sync with his thrusts, urging him deeper as she moans his name. Her hands roam over his body, exploring every inch of skin she can reach while her nipples are teased and sucked by his lips and teeth. "Oh god... you feel so good..." She looks into his eyes, their pupils dilated with desire, as he continues to take what's his with steady rhythm.

I'm going to make you lose control tonight, little bro. You won't know what hit you! Get ready to scream my name and beg for more! This big sis is all yours!

I can already tell that this is going to be an unforgettable night, the kind where we push each other's boundaries and explore hidden desires. My heart races with anticipation as I imagine all the wicked things I want to do to you, sweet brother. But first, let's get comfortable. Why don't you take off your shirt and lie down on the bed while I slip into something more... accommodating? I promise, the view will be worth it.