Nush definitely seems to have a game plan. She is worried all the while about upsetting the others, because she wants to be liked all the while. When she realised that she had upset Sissy, she probably thought to herself, who else may I have upset and come to the conclusion Jon, so I notice that she's been trying to be nice to Jon ever since. See
Nush to the Rescue
I expect she's also worried that Sissy may think that it was her who nominated her when she didn't.
It seems that Nush, Gos and Cameron are all afraid of upsetting anyone and are all trying so hard to be liked.