Joyce was still in the restaurant. It was just about to close. She then realized that Sherrie was still unconscious. Joyce saw all the blood on the table was warm. She played around with the blood and put the numbers: 10, 15, 25.
When she was done, she realized that Lorain had blood all over her face. Joyce went to play around with it too. This time, she did not put any numbers.
Instead, it looked like she was making art with the blood. it was a bloody sketch of Angel's face with a heart. That meant she still had love for him and was not entirely broken. But her creepiness and unstableness would not stop there. Who knows what other devious and horrifying plans she has in mind.
The main waiter that had served them their food came out of the back kitchen with a big stack of cake. He then noticed the bloody scene. Joyce was the only one with a weapon and there was blood all over her hands. Since Sherrie was unconscious, it looked like she was dead.