Greedy is a short fast and easy read. Let's get one thing out of the way - the marketing set the wrong expectation. We know exactly what queasy twist is showing up, the only question is how the story handles it and exactly what happens for things to get there. 

The build up to the moment is done well, and yes, this is not unsuitable for vegetarians alone, but also for anyone with a queasy stomach. I would classify this as horror, there's really no mystery/thriller element here. I first thought that the treatment of the main "spoiler" would have it read as such, but it has nothing to do with it.

I love how the real horror in the story is the protagonists desperation to do anything to put food on the table after he loses his job and gambles away all his money, down to his daughter's college fund, as well as his last-ditch attempt to keep his wife from finding out just how bad things are. That, coupled with the rising dread that accompanied his lack of options and the consequences  of owing shady people, it offers the kind of horror of a good kind - that which lurks around the corner waiting for you to make a big enough bad decision.

You don't have to, but pay attention and you just may see the actual twist at the end coming. That was a good turn, but could've been worked into the story better.

Good for one of those pacy reads with a story that does not demand focus, Greedy by Callie Kazumi might just win you over with it's easygoing approach to narration. If you're a bit picker about things like an infodumpy reveal, be wary.