"Hmm... let's see, oh I know who I gotta be." your shapeshifting girlfriend smiles as she figures it out.
"Really,... who are you going to be?" you ask.
"Well, it's a secret, hun. And I'm not gotta tell you, this needs to be a surprise." your girlfriend exclaims.
"A surprise? Okay, babe. That's fine with me, so what should I do, should I turn around or what?" you ask again.
"You don't need to do that. Now, I want you to close your eyes and not peek when I tell you to open them, okay?" your girlfriend says as she signs you to close your eyes.
"Alright, babe. If you said so," you reply to your girlfriend as you close your eyes and try not to peek at your girlfriend while she's focusing on her transformation. You stand here in your naked body and count to 20, which you assume would take some time for someone to transform. "Okay, now you can open them." the voice speaks to you and tell you to open your eyes which was different from your girlfriend's voice, which means your shapeshifting girlfriend finished her transformation. As you finally open your eyes and have a look to see who your girlfriend looks like.