First and foremost, congratulations on your engagement Lobs!

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Anywho, I'm so sorry to hear about your situation, Lobster It sure does sounds like a sticky situation but I have good news for you - things can and will get better!

Hmm maybe try asking the people that work there if they know about her behaviour. Maybe it actually is a prank? It could possibly be that maybe there's something going on between your fiancé and the people that work there. Does she personally know them? How long has she been working there? (If she's been working there at all). Maybe she's enemies with somebody that works there and wants to annoy them...?

As with the baby food: have you considered that she may be allergic to baby food? It could happen; it's definitely a possiblity. ("I can't live with this!" may mean that she literally can't live with it because she's extremely allergic to it). Ask her about her allergies, maybe baby food is one of them.

As for the cat food: is something making her paranoid? Sit her down and talk to her about it. It can be a very serious issue, you never know. OR maybe she was saying that to annoy your kitty! Is she a person that jokes around a lot? Does she have something against your kitty? What if she got into a fight with your kitty while you were at work so you missed out on part of the story. I think you should talk to kitty and your fiancé (I would preferably go to kitty first if your fiancé is losing her temper that quickly).

It can be so many things; hopefully it's nothing too serious

And your kitty looks so terrified Maybe your kitty is traumatized by it. I think you should be there for your kitty at this time. Your kitty really needs you at this moment I suggest kitty counselling. You can call the cat whisperers and they can console your kitty while you're at work. heres the link Cat Whisperer® Consulting by Cat Behaviorist Mieshelle Nagelschneider.

I also think that maybe some form of bullying is involved between your fiancé and your kitty. Bullying is not ok and it needs to stop. Talk to them about it. Don't know how to talk cat? Learn! Here's the link: If worse comes to worse then please call the police. You don't want the bullying to get physical

Also on a side note, please don't be worried and drive. It can cause you anxiety and cause you to swerve which is never a good thing. If needed please pull over to the side of the road and rest and clear your mind. You need to be safe when you drive; this includes the fact that you can't text and drive either!

Anyways I hope this help! Hope things get better between you guys

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Btw, awesome pictures! You should be a photographer!