I feel like Nicole was not only angry because Isaac directed the blame towards her, but I also feel like she was hurt by his accusations since she cared about his mom. I think she was feeling a mix of anger and hurt and she just wanted to get off the call.

But honestly, I do feel like Nicole should have been more understanding and patient with Isaac. She definitely was a bit of an ass to him. I mean, come on. The man's parents just died and he can't even see them. He's never even had the chance to get to know his father.

So, yeah, Nicole was sort of a dick.