Come out when you’re ready, there is no rush ! Wait . . . Who said you have to come out anyway, just be yourself and then if she ever asks just be honest ! It’s not like people that aren’t in the LGBTQ community come out for being straight ! My mum knows I’m bi but my Dad doesn’t so if my Dad was to ever meet my girlfriend I’d say hi Dad this is my girlfriend and then say hey name and I’d come out like that ! You mum won’t necessarily fully understand unless you explain to her x