The case is officially closed and any worry Amy had of possibly being arrested is gone. Life is good. Life is so good, in fact, that Amy doesn't even care when she comes downstairs one morning and finds the empty jar that once contained her vomit on the kitchen counter. Nick apparently found it and disposed of the evidence.
Here's another reason why Everything's Coming Up Amy: she's got a book deal. Her memoir, Amazing, will depict Nick as a guilt-ridden romantic who begs her forgiveness for the man cave stuff in the woodshed. She can't get him to corroborate her story in real life, but he will in the book, whether he wants to or not.