You reveal yourself to the girls

You walk out into the open and say "hello girls". The two girls almost jump out of their skin. "I'm sorry, I didn't mean to scare you", you say.

"Uh...we were just--", Casey begins to explain. Nicole just stands there silently.

"Calm down, Casey", you say soothingly. "You're not in trouble."

"We're not?", both girls exclaim.

"No, you're not. I just thought I'd join you two."

Casey smiles. Nicole licks her lips and offers you the joint. You take a couple puffs, and hand it back to Nicole. As Nicole tokes on the joint, you reach out and run one hand through Casey's short pink hair while groping her teen breasts with the other hand.

How does Casey react?