She gives him a show

Supergirl had never considered herself an exhibitionist, but as the guards hand moved from her left boot, up to her bare knee, the shiver of pleasure was impossible to ignore.

She stumbled slightly, his hand never leaving her knee and she spread her legs slightly wider. The movement had the desired effect, as he skirt rode up slightly higher and she could feel a cool breeze on the lower portion of her buttocks. Anyone looking from behind would definitely be able to see that she wasn't wearing panties.

It was the front that had the biggest effect however. As she spread her legs slightly, her pussy was now fully exposed to the guard kneeling at her feet, her lips already wet, as the guard's hand moved up to the middle of her thigh.

His eyes flickered up, away from her pussy for a second to make eye contact, and Supergirl bit her lip, staring down at him as his hand slid slowly higher.