She flies back to Starrware Industries to find out.

Power Girl flew directly back to her office at Starrware Industries, droplets of milk dribbling to the city below the whole way. She had been shot, and stabbed, and beaten in battle before, but this was new. She'd never been more humiliated. And it just made her more ashamed that it felt so good…. Using her intercom she instructed her secretary to that she was absolutely not to be disturbed. She entered her private bathroom, stripped of her milk sodden uniform, and surveyed the damage. Her breasts were large, shapely, and the kind of perky that can only be achieved by those who spend a lot of time in zero gravity. In other words, they were normal.

Her nipples were a different story. They were achingly, shockingly erect. She'd never seen them stand at such rigid attention before. She wasn't entirely sure that the bastard hadn't made them grow somehow. They must have been poking out at least an inch. She touched one cautiously, leaving her glove on. The milk production obviously wasn't natural and she wanted to limit her exposure to it. She knew the thought was silly since the milk was oozing out of her and flowing down her body, but still. It grossed her out.

She had barely laid her blue gloved finger to her overheated teat, and it was like a current was running through her. Her back arched, her belly muscles squirmed heatedly, and her pussy dripped with need. She wrenched her hand away, panting. That had been scary… and good. Too good. She brought her hand to her breast again, but this time she stroked herself from the base out towards the nipple. The breast itself was much more sensitive than normal from the very beginning, and the sensations only grew as she neared the nipple.

As her arousal grew, so did the pressure of her milk production. What had started as a lazy drizzle had evolved into an actual arc of the humiliating white fluid. She hesitated as she reached the nipple. This had been done to her, to humiliate her, by a villain. And it was her job to stop villains. But the very powers that allowed her to save people also excluded her from ever being intimate with them. Crushed pelvises didn't make for good press for a heroine. She was so sexually frustrated… And this felt so good…

She bit her lip, closed her eyes, and leapt into the void. She gave her nipples a tweak between her thumbs and forefingers, and her legs, capable of lifting skyscrapers, turned immediately to jelly. She fell to her knees, hands groping herself hungrily. This was beyond pleasure. She couldn't focus, could barely draw a full breath. He hips ground the air desperately, a pure animal instinct. She fell back onto the floor, her back locked in an arch from the inhuman sensations being wrought upon her. Milk geysered from between her fingers, raining down on her and the bathroom floor.

But she couldn't cum. No matter what she did, no matter how much the pleasure grew (and it seemed to never stop growing), Sin had denied her that final release. She willed herself to stop touching her body, but her hands kept stroking. Her body was begging her for an orgasm that she couldn't provide. She understood what he had done now, how easily he had made her his pet. And little did she know that Sin had planted cameras in her office before their first encounter, and had the entire show she had just put on recorded for posterity.