[Natasha sips her tea, eyes on the cup rather than Itachi as she listens to his answer.

In a weird way, it seems like he's outlining exactly why she hasn't tried to get close. Viv does a lot, and Natasha... isn't fond of being anyone's burden or their job. She doesn't like the idea of putting someone in the position where they have to be her friend, or where she's tempted to impose on them for comforts.

Which is why outside of requests for others, she usually makes do with the drops.]

It's definitely not a reflection on her as a person or how well she does her job.

[That's the part she admits aloud, tone mild.]

I suppose it just seemed easier to keep things professional.