I'm 19, and I live with my two grandparents. My grandpa has 2 differing cancers, and sleeps very heavily. Whereas my grandma sleeps lightly. I myself sleep heavily as well. My grandparents sleep in opposite sides of the house away from each other, with me between almost. My grandma came to me this morning crying and shaking with fear, telling me that the past couple nights, she's been plagued with paranormal experiences. For the past couple nights, at a quarter until two A.M. something has slipped into bed with her. She thought it was originally my grandpa, but when she looked to see, the figure had vanished. It's been limited to that until last night. At the end of her bed, the covers had risen and something slipped up into bed with her from the bottom, when she attempted to escape, a kick was delivered to her side. My grandma simply doesn't believe in the paranormal, and I am skeptical, so her outright fear earned my trust. I plan to lay in this bed tonight and see what happens. A little history about our land - It was built by my grandpa, not moved in. And just years before it was build, it was actually a riverbed. I've been here for 11 years, and there have been no paranormal activity -until now. I fear that because of its random appearance and violent nature, this may be a demon. Which scares me down to my core. Demons have no restrictions on who and where they walk. I need help, and I would like it quick. Should I fear that this is a demon, or simply a very late Spirit?

Or gramdma's imagination , could be many things

If grandma was kicked, does she have a bruise ?

Yes, she did. A mark on her side. And she is not one to even believe in this in the first place, nor is she very theatrical, and senility is out of the question. Her skepticism made me trust her in the first place.