Twice Hung - Vanessa C. Hawkins

Ethel Arsenault's been hearing noises in her brother's house ever since she arrived from Summerside, but when he turns up dead, could the supernatural be to blame, or her sister-in-law Dolly whose been caught talking to herself when night falls?

Ethel isn't sure, nor is she happy when she's left alone to care for Ernest's estate. Was her brother the victim of sweet, little Dolly Arsenault, or is some other sinister force at work? The city of Charlottetown is quick to point the blame at Dolly, but now Ethel has been hearing things in the house... 

... or is it just her imagination?