Dear GrandMIL,
The smell of that awful onion omelette that you are making is heinous. Every time you make one, it makes me barf. Normal people don't eat onion omelettes, and pregnant women hate the smell. I hope you enjoy it because it's making my already horrible day worse. So...thanks for that.
Sincerely,
Very annoyed pregnant GrandDIL
Re: OMG...she's trying to kill me.
The smell is horrid. Horrid, I say.