The mention they were lovers caused Rebekah's brows to arch but she didn't dispute the idea. Instead, she gave the woman another slow once-over while Regina answered her question. The mention that Rebekah called her brother by a nickname of sorts helped to reassure her further, so she relaxed with a little nod.

Yes, it could still be a trick but she was going to keep an open mind at the moment. "Well, this is all very interesting. You do seem like my type, though."