So for a bit of context, I'm 23 and have known I was bi since I was 17, but after all these years I still haven't come out to my parents. Back when I first realised my sexuality I was terrified of the idea of coming out to them, even though I knew they'd be accepting. I used to try time and time again to gather up the courage to just say it, but I never managed to. I think I was just scared that even though they'd accept me it would still somehow change how they saw me, or it would change our relationship in some way. Well, as time went on my attempts to come out lessened until one day I decided to just not even try anymore. I got to a place where I really just didn't want to make a big deal out of it. I didn't want to have this big coming out moment since obviously it didn't feel natural to me. Instead I thought I'd either tell them if I ever got into a relationship with someone, or if they themselves somehow brought it up even though I knew that would never happen. It's very clear to me that my parents assume I'm straight, since every time they talk about dating they default to "boyfriend" or "going on a date with a guy" etc.
So this is the reality I've been living in for quite some time now, that is until today when something really strange happened. I was just causally talking with my mum, when suddenly she brought up the topic of dating. She asked me why I'm not on tinder, which to me was kind of random, but then she continued by saying "you could just try it out and go on a date with some girl or guy." Excuse me?! Not only did she include "girl" in that sentence, which she hasn't done before, but she actually said it first?! In the moment I just brushed it off and continued the conversation like nothing happened, but now I can't stop thinking about it. Has she seen something that's somehow outed me to her or what? I just can't think of any other reason for her to say that. I also don't know what to do now, because I don't really know if I should ask her about it or just wait to see if she drops any other hints that she knows. I also just feel so paranoid now trying to think of what it is she could've seen. Any ideas on how I should approach this situation?