Maybe she's not as much investigating his date-skills, as she is pushing him to act more with his superego. Either way, his decision is rewarded with a kiss, this one initiated by her, full of passion and need and near-pleading.

Gus now just needs to call a waiter over to pack their dinner 'to go', and maybe the wine too.

While that happens, what about some actual devil-on-lap, offering herself to his attentions?