hey there! in my opinion best thing is to first talk with the one who more understandable and more wise/open lgbtq and stuff, then try to say idk maybe like { mom/dad i have to talk about something important with you } then talk about it with them in private and like, mom/dad have you heard about aro/ace ? then explain it and then look how would they react , in case if they did not react well its best to get help from friends about it, anyway hope i helped and i hope your mother understand u better :< anyway have lovely day ^v^