My view is this: you both live in the house and therefore it is a shared responsibility. Whether you work from home or not, whether you work 60 hours a week or 6, it is both people's responsibility.
I work from home 3 days a week and my partner doesn't WFH ever. I naturally do more housework just because I'm home I can do some washing and wash the pots on my lunch or do a hoover etc. However I still expect some jobs to be done by him. It has always been agreed that he is in charge of kitchen duties so cooking, washing the pots, cleaning the kitchen. I do everything else.
His mum messaged me today saying she's worried about how tired he is and could I start doing the cooking to help him out so that he can have a rest when he gets in? I'm gobsmacked and fuming a bit, but also don't know if I'm being unreasonable. If I took on the cooking as well I would basically be doing absolutely everything. I do get that I sit at my desk all day but I'm still working. My partner has a manual labour job so granted it is more tiring and strenuous but I still hold the belief that he owns this house too and should do his share. Or is my attitude wrong here and seeing as he works long hours am I being unfair? He leaves for work at 5am and gets home anywhere between 5 and 7 so they are long days. I would just kind of resent the fact that we both work yet all of the housework is left to me. I hate cooking and I'm bad at it, he loves it and is a brilliant cook which is why we have always had this arrangement and have always been happy with it. He has never complained about cooking but his mums comment has made me feel a bit bad