Gabriel is feeling it and in more places than his brother. He reluctantly lets go of his brother to let him move, letting himself get distracted by all the wandering hands.

At least until the question; at which point, he freezes and gives Lucifer a wary look. "Are you planning on making me regret it?"

He's already mentally searching out somewhere to run to if it turns out the answer is 'yes'. It would really suck to die right after awesome sex.