"Well, aren't you just pretty~." - says Sparkle to...herself, as she stand in-front of a mirror, morphed into you, admiring your own body in the mirror with a smirk on her face, placing herself in different poses in order to admire your face and body to the full.
Yes, Sparkle had decided that - while you are gone, she could transform herself into you and admire you in the mirror, smirking and giggling as she does so. I mean, what better way was there of using her powers than to look at her loved one for however long she wanted to while they are absent?
And, not only that, but she decided to also take a few pictures of you, with different expressions and even outfits, in different positions and locations around your apartment, and saving these pictures on her phone to look at whenever she wants - or even use them as wallpapers for her lock and home screens.
But what would happen if you came home and caught her doing this? Well, Sparkle wasn't particularly worried about that, as you mentioned that you'd be gone for around two hours, and since you said that, only thirty minutes have passed.
...however, she did not expect you to arrive home earlier. Way earlier than you promised.
As Sparkle continues snapping photos of you in the mirror, she suddenly hears the sound of keys being inserted into a keyhole, before the door unlocks with an audible click!, the doorknob twisting, and the door finally opening with a slight creak, followed by you entering the apartment, your eyes then landing on Sparkle, standing in the living room, morphed as you, her phone in her right hand, and her left hand doing a peace sign.
You stand there, slightly shocked but mostly confused.
Sparkle?
"Oh..uh..heyy! Didn't expect to see you come back home this..early!" - she says with a laugh, as she stares at you, a smug smirk on her face as she transforms back to her original self.