"Tiff," Katie smiled. "Kiss me again." She took Tiff in her arms.
As the two passionately kissed, Katie felt the same tingling feeling she had felt the last time, with two differences. It was much more intense, and it was concentrated in the area between her legs. Something was pushing its way out. It hurt, but she didn't want it stop yet.
Katie thrust her tongue into Tiff's mouth as her grip on her friend tightened. Tiff drew back a little, then noticed the pleading expression in Katie's eyes.
After their clinch had lasted a couple of minutes, Katie released Tiff. Katie's face was full of tears of pain, but she was also smiling.
"What happened? Tiff asked.
"I think" Katie said "I think I'm all boy now." She stuck her hand into her skirt. "I can't believe it, I'm a guy" he said.