"Honey, I'm really a shapeshifter."
As she finally speak out and reveal her secret to you, you literally don't know if you misheard it or is this some sort of prank what she just said, you then scratch your head and spoke to her. "I...I'm sorry, babe. I must have misheard you, for a momemt you said that you're a 'shapeshifter', is that correct?" you asked.
"You heard right, hun. I am a Shapeshifter." your girlfriend answered as you still don't believe what she said.
"You're kidding me, babe." you respond as you crossed your arms. "Is this some sort of prank?"
"No, it isn't." your girlfriend answered. "Look I know you don't believe me what I just said, but I'm telling the truth, and I'm not lying to you."
With that, you look at her as she seems like she's not joking around. "Well, now you're saying this, I really don't know what to say, but can you try something that would surprise me?" you asked.
"Okay, I'll show you." your girlfriend answered, then suddenly you saw her breasts which were C cups, now growing into a full of DD cups, and her hair appears to be changing into a different color from dirty blonde to red. "Now, do you believe me?" she asked.
"Y...yes, now I'm believe you." you answered as you fall into her bed. "Holy Sh!t, you really are a shapeshifter."
"See, now you believe me. So is there any question you need to ask me, hun?" your girlfriend replied as she turns back to her original self.
"N...no, not at all." you respond to her. "But can you also change into any person or any shape?" You asked.
"Of course, I could change my own gender and I can be anybody and anyone else in the world too, y'know. But I can't change into some animals or some kind of mythical creatures." she explained as you heard her. "Plus, I could be anyone you want me to be."
With that, you suddenly got an enormous erection out of the thought of this situation, your girlfriend leans toward you and sit on your lap. "Do you still love me even if I'm a shapeshifter?" your girlfriend asked.
"Of course, I do. And no matter what you are or your secret, it's always saved with me and I will love you." you answered as you kiss her.
"So, honey, what do you think we should do next?" your girlfriend asked.
"Umm..."