Don't go any further.

You don't want to do this if Sarah isn't completely okay with it so you keep your hand where it is for the remainder of the movie.

As the credits roll, you start to remove your hand from her thigh. She gasps, obviously realising where you were for the first time.

She places her hand on yours, probably afraid that you're going to move it higher.

"How long has your hand been there?" she whispers.

"Most of the movie." you say. "Sorry. I thought you knew..."

"Did you go any higher?" She cuts you off, almost panicking.

"No." you say. "I didn't."

"Okay." she says, relaxing and leaning over to kiss you. "Let's go."

She stands up and leads you out of the cinema back to your car.