Yes. It must have been stressful - I mean, that is just the truth. In guilty scenario, what she went through was stressful. The death, and then having to figure out a plan, and then all the clean-up, worry, panic, stress.
Sha actually got lucky with the Patrick thing - here is why I say that: because I think, under the circumstances, she should have folded. I mean, after all that she went through. I feel like she should have confessed, I know I probably would have. I don't think I would be able to take that pressure. And she almosttttttttt did - but Patrick saved her. Because she told the lie, it bought her some time, in that the interrogation backed off for a bit because they were figuring out what to do with this new information. Even in those few hours, we see her re-gain strength, where she issues the new statement saying basically, oh wait wait wait.....never mind, but not never mind?
If she hadn't done the Patrick thing, I believe she would have folded. She would have confessed, to some degree, what happened.