I really enjoyed this story. It was well written and I enjoyed the twist at the end. I also enjoyed how you linked it up with Gluttony with the diner scene, that was very clever. This is my favourite out of the two Seven sins pieces and I am looking forward to reading the next 5.
There was no spelling or grammar mistakes I could see and there was only two places in the story where I stumbled and had to go back and reread. The first was in the first paragraph where you called the tea nectar, I just found it a bit cheesy and I don't think the rest of the piece is cheesy, but that's just a personal thing.
The other part was this sentence; "Cassie was cut off before she could finish her thoughts, a sloppy-joe finding its way down her chest and onto her lap, covering her sundress in disgusting chili and sesame seeds. "
I had to re-read that sentence a couple of times to get it to make sense to me. It makes sense as it is it's just a little awkward. And again, just in my opinion.
As I said, I'm looking forward to reading the rest!