Care for a friendly spar?

Molly was in the Gym, training, when she saw entering that cute boy from school... this wasn't a surprise for her thought, as she was the one who invited him, suggesting they train sometime.

"Molly! hi!" he said, as he saw her there. She was alone in the gym. Around that time of the day, no one ever showed around. One of the reasons why she suggested him to come to train by that hour!

"Hi!" she said with a smile. "How are you? ready for some excercise?!"

"Of course!"

Then,after warming up, they began to work a circuit in the machines of the gym. After about one hour, as they made a short pause to drink water, Molly suggested:

"I heard in school, you are quite good fighting!"

"Yess..." he said, doubting a bit. "Only some self defense classes, really."

"We should totally fight" Molly said.

"What?"

"Oh, only some friendly sparring!" Molly said smiling. "Or maybe you are afraid of being defeated by a girl, uh?"

"eh..."

"Don't worry! I'm a thought cookie!! And don't you dare to go easy on me!" Molly said, as she adopted a fighting stance with a cocky grin on her face...