Diane informs her

"Carrie!" Diane shouted at her in a tone of sympathy, "look at you! I told you to be careful!"

"Huh?" Carrie wondered before looking down and gasping at her nakedness with her hands, "oh goodness! Was I on air like that?"

"Well..." Diane didn't want to tell her directly to her beaming eyes and buxom cherubim chipmunk cheeks that were increasingly stressed, so she changed the subject, "we should get going..."

"Now what?" Carrie undid her ponytail and brushed her red locks down to her breasts to cover them, rolling her ponytail holder onto her free hand's wrist before using it to cover her crotch.

"Well, we could take the P train back up to headquarters," Diane reasoned, "or we could go down to City Hall to hear what Police and Fire have to say."

"Are you sure it's okay to go on the subway naked?" asked Carrie.