A variation on the same idea:
Golden Girl is one of the city's foremost costumed crimefighters. Lauded by the press and public, she has nonetheless successfully kept her real identity a secret. She's perhaps a little too full of herself, but few deny her success at foiling criminals.
Unknown to her, her current boyfriend in her secret identity is also a minor villain known as The Prankster. Worse, he's discovered to his delight that the girl he's dating is really Golden Girl. Revealing her identity would ruin their relationship, even if it wasn't traced back to him, so he's keeping her secret. But the temptation to make her his favorite victim is too strong to resist... especially since their love-making is always better when she needs a shoulder to cry on and can't explain why.
A short writing sample, setting the scene:
Golden Girl watched from behind the podium as the crowd started to gather for the award ceremony. She was pleased; it was a gloriously sunny day, not a cloud in the sky, and it looked like a lot of people were coming to see her presented with an award for her Civic Duty.
Golden Girl discreetly checked her appearance in a small mirror. Her thick mane of red-blonde hair framed her face nicely. Her green eyes were mostly hidden behind the tinted lenses of her white domino mask, and a touch of make-up hid the freckles on her cheeks. Her red lip-gloss was still as perfect as when she'd applied it before setting out.
The main part of her costume was a white bodystocking covering her from neck to toes, closed by a zipper down her spine. Over it, she wore a golden bra top, which held her ample bust firm through many a melee, and matching golden shorts stretched tight across her curvaceous hips. Her figure was excellent, and she liked to show it off without actually revealing anything.
Her final accessories were golden knee-boots, higher-heeled than she'd wear on patrol, golden gloves, and a golden belt containing the only pockets of her costume. Even a costumed crimefighter needed somewhere to stash a handkerchief, car keys... and a mirror.