Though she likely didn't know it, it was a look Regulus was beginning to fall for. There was something so innocent and yet enticing all at once about it. He swallowed deeply, forcing himself to look away before he lost too much of his sense in the innocent look.
"This way..." he found them a table and held her chair for her before taking his own. The corner of the shop that they were in was relatively vacant, but not entirely. He liked it that way, no one breathing in and near enough to notice if he mistakenly referred to himself as "Black" but not so quiet and secluded that things would turn precariously quiet if there was a lull in conversation. "Thank you, for agreeing to accompany me tonight."
Merlin, Black, you sound as though she's escorting you to a funeral. Not so somber. It's only Aurora, you've been speaking to her for a long time before this, and you'll continue to speak to her after. Relax.
"In fact, I've been meaning to thank you for everything. You've been a godsend these last few days."