"Normal" how? The last sleepover I had was in 2013. Prior to that point (at least where I live) a mixed-gender sleepover was considered a big taboo. I've only ever met one trans person IRL, so I have no one to ask regarding this. What's your experience with this? Are parents today more concerned with difference of genitals or difference of gender expression?
I don't know how my parents would've felt about me or my sister having a sleepover with someone who's transgender.