Sister's back arched off the couch as he pushed deeper, filling her completely. She let out a moan that turned into a whimper when he began to thrust slowly inside of her. Her legs trembled with each movement, and she could feel herself growing wetter and hotter with every stroke.
Her hands clawed at his back, urging him on, wanting this connection to last forever. She bit down on her lip, trying not to scream out in pleasure as her whole body tingled with sensation.