Martha would have been happy to continue the conversation that ignored Adeola, but the Doctor had to go and bring her up. And not only bring her up, but nod to the ghost in question.

"You can see her?" Martha asks a little confused.

And I bet he can hear me too. Should I tell him all about it? How little you're cop...

"SHUT IT Adi" Martha interrupted. "I'm fine. Everything's fine."

Adeola, who could have been Martha's twin for all intents and purposes, merely snorted and shook her head no.

"And you Doctor? You can't be immune to this new form of torment."