Stay naked for the rest of the night

"I dare you to stay naked for the rest of the night!"

Confused, you say "Why would I do that? You said for a couple of hours max."

"I know, but I've got some friends coming over later, and I promised them a fun time."
She thinks for a second.
"If you do, I promise you'll get a big reward ;) "

She brushes her hand down your chest, sliding her fingers over your shaft and to the tip of your dick. She gives you a big grin and a wink.

You shudder in pleasure at her touch and nod your head in agreement.

"Great!" She grabs your clothes and runs upstairs, stashing them away into a trunk at the top. She locks it and puts the key onto her link necklace which dips down into her little bit of cleavage.

So now you're stuck, even if you wanted to leave at any point, you're bare naked at her whim until she gives you your clothes back.