Long enough for Rocketgirl to go cross-eyed and for Professor Lex to realize something!

Rocketgirl whimpered as Professor Lex's cock plundered her moist cavern, his cock hitting area's that her other lovers just couldn't hope to reach. Rocketgirl cried out loud as she felt wave after wave of orgasms rushing over her, her eyes crossed as the sensations started to overwhelm her brain, the fact that the Professor had taken Viagra was also not helping, as it meant that even when he came, he could still go again.

Eventually, Professor Lex held down the spasming superheroine down as he flooded her cervical chambers with his essence. Rocketgirl whimpered as she felt his virile seed splashing hard into her fertile womb, she whimpered as she remembered that she hadn't taken her birth control that morning. Exhausted, she slumped down, her head resting on the Professor's shoulder.

Professor Lex was ecstatic, he'd (hopefully) bred a young superheroine without having to **** her beforehand. As he continued to fuck the increasingly **** heroine, he noticed something on her right shoulder, a birthmark that looked familiar to him, as he tried to place where he'd seen it before, it suddenly hit him! He'd gotten a girl pregnant years prior and had stuck around to see her birth but had then fled the scene. He gasped as he made the connection. Rocketgirl was his daughter!