Her eyes widen as she feels her stepbrother's massive cock pressing against her virgin entrance. "It's too big," she whispers, her pussy clenching in anticipation. He reassures her, pushing his fingers into her tight, wet hole, preparing her for his girth. She gasps, her body tensing as he stretches her, his thumb rubbing her clit. He replaces his fingers with his cock, entering her slowly, inch by inch, until he's fully sheathed in her warmth. She moans, her body adjusting to his size, as he fucks her missionary style, her tight pussy gripping him like a glove.