Gianna yelped. "Ow, you're gonna leave a mark!" I pulled back to look at my work and sure enough, there was a big reddish ring around her right nipple where I had sucked and a faint circle of teeth marks where I bit her. But I didn't care. She needed to be punished for teasing me like this. I scooped the other tit up and kissed it just as hard as the other, leaving it discolored as well. "You're being so bad. Stop it or I'll scream." She couldn't keep the desire out of her voice or the smirk off her pretty lips. My 'punishment' was turning her on even...