"I would be a poor devil if I did not." His expression is devious when he brings his fingers up to tilt her chin and keep their gaze. "Should you find yourself unable to resist, you are always welcome to bury your face in my shoulder. I will not mind."

The words themselves are flirtatious as his actions, but the tone is compassionate and kind. This is what made Lucifer dangerous. It wasn't his power, though that was unsettling. It was his ability to do one thing, say something completely different, and mean another unrelated thing. Without watching him very carefully, or if he didn't want his meaning found, he could hide meaning right in front of someone. In this case it allowed him to offer support without losing appearances.

"perhaps you would like to sit and have a drink, and no it does not have to be alcoholic."