Hope the new update lets you avoid that, losing your virginity to Christie of all people is a little underwhelming. She's an interesting character but so early on you can't help but view her as 'just a stripper who's connected to Ella.'
You can also lose your virginity to Liz if you do her route fast enough. (well you can also technically lose your virginity to the zombie girl but.... well I personnaly consider that worse than losing it to Christie)
Losing it to Amber is not possible I think? At least it doesn't show up as an alternative in the walkthrough, which makes sense considering how late into her first questline her first sex scene is
unless I'm mistaken if you prioritize amber and say no to her friend who wanted to make a livestream with you you can definitely lose your card to her. her quest is long though.
