This night is not the same as last night.

When I asked Kauri about throwing up last night at 5 AM (this was the other day),
 she said, "THIS night."
I said what do you mean THIS night?
and she reminded me that she did not throw up LAST night, but that it was THIS night that she did.

meaning: it was still dark so it was "night," but it was more toward today than last night, so it was "THIS" night.

It makes sense to me...