Tell him the truth

"Josh," Krista began, shivering. "There's something really important that I need to tell you."

"Mmmhmm?" Joshua mumbled sleepily.

"You keep calling me Ashley."

Josh gave Krista an odd look. "That is your name..." he said, confused.

"Well, sort of. But not really," Krista continued nervously. "You see, Ashley had to go take an exam, and she really didn't want to stand you up. So.... she asked me to go instead."

"And you are?"

"I'm Krista, her twin sister."

Joshua's face was shocked. "But... we uhh we-" he stuttered.

Biting her lip, Krista quickly said, "It wasn't supposed to come to that, honest. I mean I was just supposed to show up and then leave, but as the date went on, I couldn't help but be attracted to you."