Do you think it's ok to ask my parents if i can call them by their names instead of mum and dad?

I've been thinking about doing this for sometime as since my mother has retired i think she has been using me to give herself a sense of purpose (cooking meals i didn't ask for, wanting to meet every day when i don't want to for example).For some reason i feel really uncomfortable calling her mum as i feel like i'm reinforcing her role as a mother when i've never felt particularly close to her. Has anyone made this change who could give advice on how to go about it?