Hunger of the Old One

"As the Ancient Evil continues to twist her body in ways she never dreamed, the Cultist feels a growing hunger gnawing at her innards.

"Grotesque, spider-like limbs extrude from her back, and carry her off of their own volition to find flesh to feed that hunger".

Yep, the body looks weird because her head is twisted 180 degrees, "Exorcist" style (i.e., she doesn't have boobs growing out of her back ).