Estrus

"You are displaying active signs of ovulation, high hormone levels, and physical signs of sexual readiness associated with estrus in domestic animals such as pigs, sheep, and dogs," the robot said.

The Invisible Woman frowned.

"That's impossible, H.E.R.B.I.E. Humans don't...go into heat. We're on a menstrual cycle, not an estrus cycle," she said.

"Affirmative," H.E.R.B.I.E. confirmed. "But your cellular structure has been compromised by mutant DNA. Your reproductive system is struggling to adjust to the cumulative effects of your injury and your exposure to this DNA. Statistical modeling of current biological vectors suggests that if this condition persists, your system will collapse in one week."

"Collapse?" Sue said. She felt idiotic, simply repeating what the robot said, but her head pounded. The fever in her flesh made even thinking hard. Her pussy pulsed with an urgent, undeniable need that seemed to increase with every moment. She leaned against a table, fighting the urge to press her swollen cunny against the edge of it.

"In some mammals, prolonged lack of intercourse leads to systemic collapse and ****. Your artificial estrus has severely disrupted your metabolism," H.E.R.B.I.E. said. "No existing synthetic hormone system can deal with this imbalance."

"So...I need to get laid within a week or I'll day?" Sue said, sweat dripping down her body.

"Correction: You must be impregnated within one week. Pregnancy resets the estrus cycle, and should end the imbalance," H.E.R.B.I.E. said.

Sue Storm bared her teeth. This was insane! To think she would have to get knocked up just to overcome whatever Porkum had given her... She remembered the sight of the pig-man's last photo. Those fat balls, the enormous ejaculation. With dread certainty, Sue knew that Porkum had known this would happen to her. That he had done this to her on purpose.

Then a thought. A strange, terrible thought, came to her. With it came a plan that the Invisible Woman would never have considered in saner times. Yet she was dying, gagging for sex, targeted by an unknown mutant, and the rest of the Fantastic Four weren't even in this dimension.

It was time to do something ****.