Nita's not as protective of her ticket as she is her Manual; it can often be found in her hoodie pocket when she's not on missions.

She's also distracted, both by Kitty's Network post and the ensuing conversation, and what appears to be an attempt at conversation with an ICP unit itself in the Speech, trying to coax more information about the heart-data out of it or the train, whichever gives first. The answer is neither.

The point is, her ticket is partly visible, accessible, and she's not looking in A-Qing's direction. Score!