"Perhaps you'd like to tell us about your business. Like what business brought you here, next to us, when we sought to find a private meal." Though her face is rather calm, Orianna's tone offers a suggestion for Rhona, with a bit hidden behind it as to how she might get them to let her pass.

Spoiler: OOC
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Persuasion I think? Orianna's not really threatening, more offering "if you tell us we'll let you go without issue."

Anyways here's a roll, assuming it's a Charisma check it will be the same: (1d20+3)[9]