Punishment for rule-breaking

You and Astrid nervously waited to see if the gate would open. For several minutes they stood in awkward silence, with you sneaking glances at Astrid's pale, curvy butt while trying to keep your erection under control.

"Maybe nothing's going to happen?" You said.

Astrid opened her mouth to respond, when suddenly a hatch in the ceiling opened, and a small box fell down! She reached down and opened it, and with you peering over her shoulder.

"What is it?" You asked.

"It's... handcuffs? And there's a note here, too," she said.

"What does it say?"

"Umm... let me see... it says, 'Cheaters get the punishment they deserve... sacrifice a real article of clothing, then wear these instead.'"

"What?!" you shouted, confused and nervous.

"I knew the blanket wouldn't count!" said Astrid, frustrated. "Now we have to give up even more, and someone's gotta wear these!"

You gulped. You did not like the way Astrid was looking at your last article of clothing.

"Sam..." she said. "I mean, it really is your fault for making me give up that blanket. You should give up your boxers, and let me put these on you." She waved the handcuffs in the air.

"I am not going to strip naked and handcuff myself!" You said, gasping in shock.

"I won't look! At your penis, I mean. And besides, I can practically see it anyway right now!" she said with a giggle. "It would be the chivalrous thing to do," she added, batting her eyes.

You blushed and put both hands over your crotch to cover up your apparently-obvious erection.