EXORCISM (TKOD Story)

A girl named Ashley has a huge family history of Witchcraft and Dark Magic. She even lives in a Gothic Victorian mansion along with her 2 sisters, 3 brothers, and 2 parents. Her family thinks she can only summon a weak demon such as an Imp.
So she decided to try to summon Satan. She thought she succeeded, but she was wrong. She had summoned a Banshee Demoness named Gehenna. Gehenna wanted to make a deal with Ashley. Gehenna said that she can make her family popular if she can possess Ashley.

Ashley agreed.

Will Ashley make it out alive within the deal and get rid of the Banshee? Or will she die in the hands of a demon.