You find a loophole for Amber

"So I have to guess one girl here?" You ask.
"Ooh, hints cost something remember" Amber answers coolly. You think about it and respond "I'll take that trade."

"Give me your shirt" she says. You blush a bit but take it off and hand it to her. She ties is around her waist, using it to push up her cleavage even more.

"Yes, that's all you have to do. Guess the name of one girl here."

"Great, well I choose you. Your name is Amber."

A look of confusion crosses all three girls for a moment, and then Amber begins to laugh. The twins look less impressed and both share a scowl and some whispers.

"How clever," says Amber "Ok, not what I expected for the night, but I'm game."

Elated, you try out a command "Good, give me back my shirt."

She laughs again but complies "I'd rather give you mine though."

You blush and the twins interject.

"Triple dare." Says the one in blue. "Guess correctly, and you get all three of us."

"Guess wrong, we all get you" the one in pink continues.

"Ah, they're jealous for our night" mocks Amber "I'm game, but I promise you won't forget tonight whatever you choose."