WayHaught handling fights

So I'm just wondering:

When Waverly kept Nicole out of Black Badge, Nicole was mad, but quickly got over it.

When Nicole hid the DNA papers from Waverly, Waverly lashed out, sent her an awful text, and cheated.

Waverly didn't even realize the similarities between what they did sooner? And Nicole seemed to have forgiven Waverly too quickly about it. In fact, she always forgives Waverly so quickly.

Nicole voices her opinion, but doesn't press further on issues. And she rarely, if ever, calls Waverly out on anything!

Nicole stands up for herself to Wynonna, Doc, and Nedley. Where's that backbone with Waverly?