The victim had re-varnished and painted the property, but Shaw and Halliwell scraped the fresh paint in four bedrooms, the hall and the kitchen, police prosecutor Sergeant Grant Gerken said.
Shaw then defecated on the toilet lid and used towels belonging to the victim to wipe herself.
The pair also ripped the pages from a bible belonging to the victim.
Counsel for Shaw, Kieran Tohill, who was also acting on behalf of Halliwell's counsel, entered guilty pleas for the pair but said through counsel they would both apply for a discharge without conviction.
They were remanded until November 19.