well.. to be fair. They were gonna say it was an accident. Kat would say they found him that way and Zakiya would be safe. BUT.... she opened her mouth before Kat could do that, and with that story falling apart and Kat loving her so much, she decided to take the fall to spare her baby sister. I kinda understand why Kat is so mad at her right now and why she'd give her that look. I might have done the same. I think Kat knows she's going to prison since she saw what Johari did to Niki.