I think it's really odd that your mom would reply like that. I mean, my mom knows I'm a loveually active straight male, but even if she didn't she'd assume that I was joking or a friend had taken my phone if she'd gotten that text from me.
probably just a different parent-kid relationship, i know if i texted anything like that to my parents ever they would take it 100% seriously because i lock my phone and my friends know how uptight my mom is
anyways i came out to my parents last year, they don't want me to come out to my friends but i'm thinking i might do it anyways sometime this year because i'm totally comfortable with it at this point.
congrats nightfox im proud of u