I kept hearing my sister whisper even when she’s not around

I kept hearing my sister whisper even when shes not around, i regret investigating further.

It all started when i (M17) was going on a walk in the morning and decided to stop by a coffee shop since i hadn’t eaten breakfast yet and i was the only one in my family awake so i enter the coffee shop but before i order i decide to use the bathroom which was downstairs in the coffee shop so i head down the stairs and it looked very creepy but i needed to use the bathroom so i do but when i exit i hear my sister (who wasn’t even awake let alone be there in the coffee shop) call my name and so i rushed upstairs to the main area of the coffee shop and find nobody who i recognize, just a bunch of strangers so i ignore it and order my coffee and food so an hour later i’m done with my food so i get back home to find everybody still asleep so i decide to check if there is anything interesting on tv but before i switch it on i hear my sister whispering from the kitchen and i go to check it out but i don’t find anything except for the basement door open wide so i look at it from a distance and i can’t see anything but pitch blackness so i decide to ignore it but then i hear more whispering this time from inside the basement so i go to the door shut it and continue my day and i watch tv for hours until i realize nobody is awake yet which is very strange so i go up into my sister’s room and knock but i don’t see anything so i enter and her bed is empty, then i saw something stuffed in the closet, thats when my sisters hand fell out of the closet, i am currently writing this while hiding under a table and i think i hear footsteps