The stolen superpowers

Superman's cousin Supergirl is a reckless teenager with powers like his own. When they encounter Parasite, who can absorb Superman's strength and super-speed just by touching him, Superman knows not to shake hands with him, but Supergirl is not so lucky. Filled with her power, the Parasite battles Superman in a fight that rocks the planet. How can Superman defeat a villain who gets more powerful with each punch?