As he sorts them, Natasha takes them back, wraps them around each other and keeps them separate. Apparently she's not as adverse to 'going native' as her serious demeanour might suggest. If this is how the city works, then this is how the city works. And if they were serious about the sex, she sees no reason to doubt the assertion that it's how money and status are attained. You can't do much without cash.

By the time Dean is finished with his explanation, Natasha has tipped to the side, observing a couple behind him. "I can see that." Very clearly, in fact, as the man drops down to his knees and his grinning faced disappears underneath his partner's short skirt.