@Monaco1
I can so relate! We are a home share situation too; a 2 ensuite bedroom house with a Great Room where we live, work, cook, eat, listen to music, watch movies - all the pleasures and activities of daily life. When our own cooking odors get too much for us, we open doors and get a draft through the house, weather permitting; in addition to the exhaust fan in the kitchen. We cook simply when guests are here, knowing that they may also want to use the house kitchen even when they don't let us know ahead of time. We keep any potentially disturbing activities to a minimum, in deference to our guests. They have a basic kitchenette in their space, just not a stove.
If a guest complained to us about any of this - especially if this is a first complaint ever - we'd have to chalk it up, and understand that perhaps this guest might not be ideally suited to a home share situation.