Police confirmed the man had been dead about a month and Shock had been using his bank card, the Free Press reported.
Shock was taken to a hospital for evaluation. She was interviewed by officers the next day. She was arrested Friday and charged with concealing the death of another, WDIV reported.
Shock told a judge her boyfriend was her only means of support, WDIV reported.
Shock is not the first Michigan resident to have been caught living with a corpse, according to the Free Press.
In December 2017, investigators found a 49-year-old man had been living with his girlfriend's body for about a month.
In April 2018, a 62-year-old woman had been living with her boyfriend's badly decomposed body for several months.
In July 2018, investigators said a Detroit mother had been living with her dead daughter's body for eight months.