Your house, Jimmy's house or Trish's house

As you and Jessica headed out, neither of you notice the shadowy figure that slipped into Jessica's bedroom through the window. The person shimmied up the drain pipe with skill and entered the room. Inside, Jessica was starting to take form but this person wouldn't have any of it and shot her with their own black pen. Almost immediately, she deflated back into a pathetic skin fit only for someone to wear. The figure did exactly that and donned the skinsuit swiftly. They then spent about twenty minutes in Jessica' room before climbing out the window as themselves again, the room not disturbed majorly and the unfortunate Jessica lying in the middle of her bed as she regained form.

*****

[Jessica's POV]

You wake up lying on your bed. Your head is fuzzy and you have no idea why you're naked, after all, you don't sleep naked. As you pick yourself up off the bed, you hear the ringing of a phone. Lying nearby on your table is an old Nokia phone which is clearly not yours. Your iPhone is right there next to it. You pick it up and notice that the number is blocked. It rings out but as you go to put it back down, it rings once more. This time you pick it up.

"Hello?" you ask tentatively, not sure what to expect.

"Jessica, listen very carefully to what I'm going to say and don't hang up." The voice on the other side is digitally distorted and there's no way to tell who it is.

"Listen you creep, I don't know how you got this phone in my room... "

"I can explain why you're naked and confused in your own room and why you have no memories of going to sleep or waking up this morning. In fact, it's actually 3pm already."

You look at a nearby clock. There's no way you would've slept that late and you've never even been able to sleep past noon when you tried. There was definitely something amiss here and you figured there'd be no harm in listening.

"I'm listening."

"The reason you can't remember anything is because your boyfriend's friend Jimmy used a special device to wear your skin and impersonate you for the last 12 hours or so. David was here too but he left not long ago after finding out."

You're in disbelief. None of this made any sense and what the stranger was saying was completely ridiculous.

"Listen freak, I don't know who you think you are, but if you don't start making any sense, I'm hanging up."

"Go to your phone and look at the photos." You decide to humour this person one more time but when you open the photos you notice something odd. A whole series of selfies with increasingly silly facial expressions and poses which you don't remember taking.

"Do you believe me now? That was me doing that. I wore you briefly after Jimmy so I could leave you some proof. My deepest apologies for having done so but you wouldn't have believed me otherwise. I want you to watch the video that I left you on your phone. After you've done so, just follow the instructions. I'll be in touch."

With that, the voice hung up. You stood there with your mouth agape, holding a phone in each of your hands and butt naked. What were you going to do now?