You call to the person to come in. Awkwardly you get your clothes on. It feels weird to put pants and underwear over your new crotch. You can feel a tightness where your dick used to be as the cloth presses up agaisnt your body in a way it couldn't if you were still a male.
You walk out to see someone in your living room you sort of recognize, a normal looking girl with brown hair and blue eyes. At fist you think it's a stranger but then you realize it's your best friend, now female in this new world.
She asks you, "Hey, Are you ready to go to the party tonight? Heard there might be some cute people to pick up. We'll, you have a date now. But either way, it'll be a good time. I heard you two are finally going to do it."
Though she's able to be a bit more explicit now, she's definitely the same person as a girl then as a dude. But more importantly, if you're still dating your gf that means you'll still be able to fuck her. Though you can't actually fuck her like a man, it seems your first experience with her is going to be a lesbian one...