It's your fault he's clenching his jaw, his hands squeezing his thigh as if it can alleviate the tension.

You're such a brat, teasing him so openly by 'shifting' in your seat like you're aiming for a reaction, and it's driving him up the wall. But the last straw is when, after he's told you to stop moving like that, you mock him for 'tapping out.'

You know exactly that you're using his words against him, and God he breaks for it.

"Fuck," he mutters under his breath as you move again.