I stared at her chest as she clearly intended and tried to speak. Her nipples had tightened, either from the bouncing or from rubbing against her tight top, either way it was more than I could take in. "I, I, Um." I was blushing intensely, and became aware of another horrible sensation of tightness from my jeans.
The girl stared at me for a moment, then realized what she'd just done. "Oh my god!" She crossed her arms over her chest and turned almost as red as I felt. "I can't believe I just did that, I mean, 'wha! Lookit my tits guy I just met!'" She turned away from me, still blushing.
"I, a, they're, I mean, um, really nice?" I slapped a palm against my forehead "Stupid, stupid, stupid.."
"Hey! Stop that!" She said.
I paused and looked at her.
"With those muscles you'll hurt yourself!" She started giggling, and before I knew it I was laughing too. Pedestrians walked by, either ignoring us or with slight smiles of their own.
"Okay," She said, and stuck out her hand, "Lets try this again. Hi, I'm Mary."
I shook her hand and smiled back. "Hi Mary, I'm Steven"
She leaned her head to the side and squinted at me. "Have you always been Steven, or did you just want people to call you that, and figured with your new muscles it might stick?"
I blushed again and stared at our still clasped hands "I... Stevie. People call me Stevie." I finished lamely and hung my head.
"Okay Steve, lets find somewhere to sit and talk about what's happened to us."
I glanced up as she walked past me and started pulling me along behind her. Well, with my muscles it wasn't like she was forcing me, but I liked holding her hand, and well, she was treating me better than most of my friends did.
She was looking ahead, trying to see through the crowd. My attention was captured by the back of her skirt where it was molded against the curve of her ass. She looked back over her shoulder and caught me staring. I started to stammer and blush again and she just giggled.
"If that expression is any indication I can't wait to get alone in private in front of a mirror!" She grinned, and hauled me off the sidewalk into a little park.