A little backstory: my fiance, two kids and I moved across the country. His dad helped drive the truck until we picked up our nephew who drove the rest of the way. We had agreed that FIL would stay with us for one month so we could start paying him back for what he paid to help us move. One month has turned into three now.

FIL has caused a ton of issues already by running his mouth or by leaving our front door open and he just leaves. He's also done a ton of other things that aren't really relevant to this post, but I can go into more detail if anyone asks.

Fiancé, kids and I take days trips pretty regularly to the park. Every single time we leave for a couple hours FIL will cook something that leaves the entire apartment smelling terrible. The smell will hit you in the face even before opening the door. It's awful. Today it was the absolute worst. I couldn't even get my key into the lock before feeling like I was about to vomit.

Fiancé also stated he couldn't breathe, he had to run outside for fresh air. We have every candle i own lit, the ceiling fans on full blast, the windows open and it's been almost 2 hours since coming home and it still reeks. It's nauseating.

I don't know exactly what he's making but I have seen some of the stuff he's cooked before and the best way I can describe it is black tar. The smell is strong and nauseating. It doesn't even look edible.

My fiance and I started talking. I want to tell FIL to not cook whatever it is he's cooking to smell the whole apartment up but fiancé is saying it's not right to tell a grown man what he can or can't do. The thing is, FIL is a guest. He's not paying rent. He's not helping with the bills. He's doing nothing of that sort. He does buy his own food but I've seen him take food from us before as well as other things of mine.

Would I be the asshole if I told my FIL he can't cook whatever it is that smells terribly? I'm not trying to say he can't cook at all, just can't cook what is making us sick.

Edit: HE FINALLY LEFT!!! Soon after I posted this he started telling my fiancés mother that he needed to leave ASAP. Apparently someone was stealing money off one of his credit cards he didn't know he even had, something about someone opening one up in his name? Not really sure. I only heard little snippets of the conversation. And the friend of his that he's chosen to put on his health insurance plan stopped responding to his calls or texts so he decided it's time to leave. (He told us he pays for a health insurance plan for his friend. Never explained why)

I was going to update when I first heard he was planning to leave but I wanted to make sure it was actually going to happen before getting my own hopes up or anyone else's. I'd been told he would be leaving by a certain date several times now so I needed to make sure it was the truth.

His room still smells pretty bad but it's not as bad when I'd posted this. We've been airing it out for a few hours and will be in there cleaning and scrubbing everything so hopefully the smell will be fully gone soon.