Sharing a kitchen isn’t easy

Hubby may be discouraging you from being in there much so as to not step on mom’s toes so to speak.
Not that it sounds like your mom in law is in there cooking but she might be funny about someone cooking in her kitchen. I can cook well when I do but I am not really consistent at it. We often eat soup, sandwiches or a frozen pizza for dinner, or boxed meals like hamburger helper. They only take 20 minutes or so. That’s nice you can live with his parents though. Must save you a bundle on living expenses.