Sim Sleuths: A Recipe for Murder (Mystery Game)

I know that it's been solved but I've been going over the clues with my best friend and I'm going to post what we thought and we'll check afterwards.

From the beginning we were thinking Bella and Cassandra had something to do with it. Bella distracts the waiter and the bartender while Cassandra (who took forever to get back from the bathroom) switched the pufferfish. But with the information that Bella wasn't getting the attention from her husband and that the Feng's marriage was a convenience thing (or so they said), maybe Bella and Victor were having an affair and she was the one in the picture. We then thought that she might be being blackmailed by Geoffrey but thought it would be too obvious.

It wasn't until we read the question that @bluedanube asked that we changed it to just Cassandra. Cassandra saw something and the "course of action" she took was murder your honor.

So, we accuse Cassandra Goth, in the kitchen, with the poor quality pufferfish nigiri.