Kidnap her

Forming a collar out of the Barosian leather, the Cloth Countess fastened it around the Avenger's neck. "With this collar, you'll now be my powerless pet." she explained. "And now for the final touch."

"Like hell I'll be your pet!" Luna cried before she felt herself getting sleepy. "Now then, sleep tight my darling." the Countess purred, using her psychic abilities to make her arch-foe fall fast asleep.

Luna was abruptly awakened when she was dropped into a bathtub filled with warm water, still naked except for her necklace, mask and the collar she was **** to wear. "It'll take more than a-" she cried, but then she realized what she was currently stuck in. "....nice, warm bath...."

"Good to see you're finally awake." Cleo said to her enemy, changing out of her costume from behind a folding screen and emerging just as naked. Even at the age of 44, the villainess's body still refused to quit and her proportions were perhaps on par with the All-Natural Avenger. "Go on, get comfy. Make yourself at home my favorite exhibitionist."

"Why did you bring me here? Is this some kind of **** trap?" the Avenger asked while the Countess stepped into the tub right next to her.

"Oh nonsense my dear naturist." Cleo purred. "Okay, I did successfully make off with that leather I was gonna steal, but the other reason is because I want to know more about my sweet little nemesis. A little girl talk in our birthday suits."

"I don't think I'm following." Luna said nervously. "Are you sure this isn't an excuse to learn my secret identity and hold everyone I love hostage?"

"That depends on how this goes." Cleo answered. "It's only been a few years since you moved to Natureville to start fighting crime and we first met, but beyond the repeated cycle of I do something bad & you stop me, I always felt like we could do something more. To start, why don't you take off that necklace first?"

"I knew it!" the Avenger shouted, angrily rising from the bathtub and preparing to leave. "This is an excuse! I know you'd try and come onto me just for my secret identity!"

"No wait darling, please!" Cleo begged Luna. "This isn't a trick, I promise with all your heart! Please come back!"

"You want to know who I really am? Fine!" Luna continued shouting, taking off her necklace which made her mask and brown hair disappear. "My name is Luna Clark, I'm a nudist just like my alter ego. Happy?"

"Yes, I am." Cleo answered wistfully, stepping out of the tub and suggestively swaying her hips as she walked towards Luna. "That hair of yours is so radiant. And Luna, what a beautiful name too."

"Yeah, my parents chose it when they found me after I was warped away from my home planet." Luna explained. "My Barosian name is Na-Tur, and my homeworld was one where the people had no concept of clothing whatsoever."

"That would certainly explain a lot." the Countess muttered, gently cupping the Avenger's head in her hands and giving her a gentle kiss on the nose. "Would you like to stay and tell me more?"