[ Her nerves persist up until the moment he says something. For all the years she's spent trying to read those around her, whether it was actively or passively, she finds it difficult to read him as he turns over the pieces in his hands with a scrutinizing eye. 

Despite her best efforts, the little sigh of relief that she lets out from under her breath is probably audible enough for him to hear. Or maybe it isn't considering how exasperated she sounds in the next breath. Some part of her recognizes that he's being kind. And that in some other world, his world specifically, this is what someone would equate to praise when it comes to Rufus.

That doesn't mean she can't be a little bit sassy back. ] 

You could just say, "thank you," you know. I'm not some business deal. 

[ Although that's exactly the sort of deal they'd struck, wasn't it? Attitude gives way to mild embarrassment. ]

I'm glad you like them though. Hopefully your friend will like them too. 

[ Is there an emphasis on 'friend' in the hopes that she'll find out more about this unknown receiver? Maybe. ]