[It's not as if she spends her time looking at his ass in order to notice the stupid tail. But indeed, she saw someone without wings so she assumed it was a newcomer, but it was Vegeta, which was impossible given his attire. She was shaken by seeing his face, at first, but her brain soon catches up again.

That and he's surprised by her knowing him... So... It's Vegeta. From before Namek at the very least, maybe from even before that... Would it be too obvious if she turned and ran away back to the house and locked the door? Probably. And it would be pretty useless as well.]

Well... Let's just make sure I'm not mistaking you for someone else, okay? Are you the great Vegeta, prince of all Saiyans, the strongest of them all?

[She would say "strongest of the universe" but... Freeza. And yes, she's totally aiming to stroke his ego. Stroking his ego is the best way to get things to work with him when she's unsure of if her life is in danger.]