Am I wrong for expecting this/feeling this way towards MIL

Hi so I live with my in laws and have a full time job. My mil does not really work and is home allll day. She will wait until I get home to start cooking so I can help her- she does nothing on her own she won’t even unload a dishwasher until someone comes home so either they do it or someone helps her do it. When I come home from work I love to do a quick workout to get it out of the way- it’s important for me and my me time. I know she hates it but idc. So I’m down with my workout and shower and get downstairs and she goes- “you really need to start helping with the food because I don’t want to stress myself out” and I just stood there like did I hear that right? Stress out? From what? Waking up at 10am having your coffee and sitting and watching tv all day? The only productive thing shell do weekday is maybe a quick mop and vacuum and I’ll do all the other cleanings on the weekends. Am I wrong for at least wanting her to cook just one meal since me and my husband are working all day? It bothers me because if it was the other way around- she would be furious if this was done to her. I don’t mind cooking- I’d prefer it actually but I also don’t like being micromanaged which is what she does whenever I attempt something on my own which is why I just hav stopped. Idk what to do but it is gettttrjng to me and I’ve grown resentment towards her to the point when I dread going home