fright, external interference and realization

Stefany found herself screaming and taking a few steps back, and while she had it in her hand, she pointed the sword at the stranger in front of her.

Stefany: Who are you? Where did you appear from?!

Stefany stepped back at the sight of the sword.

Stefany2: ...stay back! This is my house! If I scream! The neighbors will come!

Stefany was confused and scared. If the neighbors had actually shown up and seen her threatening her... mirror image, would they have thought she was the impostor?

Stefany: What are you saying? This is my house! You appeared out of nowhere after... I cut myself.

Stefany2: What? No, I found myself on the ground after cutting myself!

Stefany: So why am I the one with the sword?

Stefany2: You... you must have took it while I was scared!

They heard someone knocking on the door.

Stefany instinctively threw the sword from her hands behind the couch, the fear of being caught with a real weapon was too much.

Slowly, keeping an eye on the other Stefany, she approached the door and opened it with the deadbolt. Outside was the neighbor, old Clark.

Clark: Are you okay, Stefany? I thought I heard you screaming, I went over to check.

Stefay began to consider what to say. On one hand, she had an intruder in her house, on the other, she didn't know how to prove she was the real Stefany.

Stefany: It's okay, Mr. Clark... I was just screaming on the phone, something happened... crazy.

Clark: ...OK, I understand, (quietly) wink if there are burglars in the house.

Stefany: No, I don't have burglars in the house.

Clark: That's good, try to be more careful, miss.

Stefany closed the door and turned around. Behind the couch, with the bifurcation blade in hand, was the other her.

Stefany2: Okay, I have the sword, so I'll ask the questions and you answer.

Stefany: Okay?

Stefany2: Who are you? Where did you appear from?

Stefany: My name is Stefany, and you're the one who appeared out of nowhere after I cut my finger.

Stefany2: Impossible, swords don't make things appear!

Stefany2 struck a lamp sitting on a cabinet, cutting it cleanly, but it instantly reassembled while a second one shattered on the floor, leaving them both speechless for several seconds.

Stefany: The sword... multiplies what it cuts? Are you my... clone?

Stefany2: It can't be! You must be the clone!

Stefany: Hey, calm down... Stefany, apparently I... am you... and you are me.

Stefany2: This is absurd.

Stefany: It is.

However, they both saw the lamp being cut and then immediately rejoined; they could still see the remains of a second lamp on the floor.

Stefany2: Let's pretend I believe you... for now, what do we do about it?