Sensitivity to Cooking Odors. Is this something I should discuss with her doctor?

My 89 y/o MIL has become extremely sensitive to cooking smells. As soon as I start cooking anything with seasoning she has a fit, starts closing doors, opening windows and retreating to her room. She says the smells make her sick. Last night it was a oven roasted chicken with nothing but Montreal Chicken seasoning but it happens when cooking anything that's the least bit seasoned. I'm not sure what to do, I don't want to make her uncomfortable but even bacon frying will set her off. I try using the exhaust fan but its not good enough. Is this something I should discuss with her doctor? Everything I've read is that as people age the LOSE their sense of smell, that is not the case here.