Incredible!

"Uh, Doctor?" Kitty, are you ok?" You wave your hand before her eyes, never knowing her to just... space out like that.

She came back from daydreaming, shaking her head some. "Yes-- Uh, yes. I'm fine." She moved away, putting the earpieces of her stethoscope in her ears and placing the diaphragm against your back. You asks you to breathe deeply, which you do, and she puts it all over near your shoulder blades. "Well," she smiled. "I know you were healthy before, but your heart is beating a little faster than last time." She took out the earpieces and rested her stethoscope on the counter. "That would confirm some suspicions I have..."

"What suspicions?" you ask. This was starting to seem like something out of a mystery movie for you.

"It's... your DNA." She took a long breath, feeling every fiber of her body pulling her to you like a magnet. 'No... Not yet...' she whimpered in her mind. Kitty believed she would know when her other self would appear, but she had business with you to clear up first.

"Are you ok?" Watching Dr. Katari grip the edge of the counter concerned you enough to inquire.

"I'm fine, Mr. Shadow..." she replied with a quiet, husky voice. She straightened up, and seemed to act like herself again. "Your sperm count has been unusually nonexistent. It's as if your body is creating unstable sperm that completely break down as soon as you ejaculate on or into a woman. And then there is the matter of your body absorbing female semen as if it were water..."

What you were hearing couldn't possibly be true. Especially some nonsense about your body soaking in cum from other girls.

"All the women you've ravaged..." She seemed to drag out the word 'ravaged' a bit. "They came to me, wondering if you made junior Shadows inside them. After examining your gooey, thick cum from three of the donors, it's as though your DNA changed with each new metahuman, adapting theirs to your own..." She turned around gracefully slow, blushing as she had those familiar bedroom eyes. You watched as Kitty had her hand in her panties and rubbed her fingers against them, up and down her concealed pussy lips. "Shame I don't have any powers to give you... I feel as though I've come down with something... serious," she purred.