She complies

Supergirl froze for a moment, she realised she had just two choices. She could either remove her boots and risk flashing the guard again, or just leave.

She looked around, realising that Superman was no where to be seen. He'd clearly already gone in. Any hope of leaving was now gone.

Slowly she bent her knees, reaching down to pull off her boots. She could feel the front of her skirt riding up as she did, and the look on the guards face left no doubt that he could see everything. What was worse was that despite her humiliation, she could feel something else.

Little did she know you were using a small dose of your power to increase her arousal, causing a wet sheen to coat her pussy lips under the guards watchful gaze.

Finally she had the boots off, straightening and smoothing down her skirt again, handing the boots to the guard. Next year she was going to come to Comicon dressed as someone who wore trousers.