He stops here, before embarrassing himself any more.

"I don't know what you're talking about," said Darren angrily, grabbing his underwear and pulling them back over his still erect dick. "This just happens sometimes. No reason boner. No need to be a jerk about it."

"W-wha..." stammered Annette. She clearly wasn't expecting this.

"Now are you going to keep your promise or not?" he said.

"I..." she said. "I do think it's important to keep promises. But..."

But before she could say anything else, her hand slipped, and this time the towel did accidentally slip out of her hands. She scrambled to catch it, but it fell to the floor anyway.

Revealing ... she wasn't actually naked under the towel. She was wearing a relatively modest one-piece swimsuit. Her hair had been covering the shoulder straps.

"Oh," said Darren. "I guess that makes sense."

"Hey," she said defensively. "I didn't lie. I never said I was naked under the towel!"

"Okay," he said. "What about when you promised to let me see you in your underwear?"

"Um, I was going to..." she started to say.

He picked up her underwear off the bed and shoved it into her hands.

"Go change," he said. "If you're serious about keeping your word, that is."

"I..." she said, but trailed off. She didn't have anything more to say. She wordlessly went back into the bathroom.

A few minutes later, she cracked the door open and stuck her head out.

"Come on out," said Darren.

"Wait," said Annette. "Please. I didn't think it was going to go like this."

Darren said nothing.

"I don't let anyone see me like this. No boyfriends, not even in the locker room. I don't even wear a bikini!"

Darren still listened and said nothing.

"I think modesty is really important," said Annette. "But ... I do think promises are important too. So I will keep my promise. I will come out and let you see me. Unless ..."

"Hm?" said Darren.

"Unless you release me from my promise!" she cried. "Then I could keep my modesty. Please! I'll do anything else!"