The recent Globe & Mail article says she was home.
(paraphrased)
It says that she (MBM) and her partner DM were asleep in their bedroom with their 16-month old daughter.
The mum called 911 at around 10am and reported the children missing.
The article also says that Staff Sergeant Curtis MacKinnon of the Pictou County District RCMP stated that, based on input from major crimes investigators, they are re-examining areas of interest like culverts, wells, and areas around the residence - probably for the third or fourth time, he said.
Staff Sgt. MacKinnon said they are exploring all avenues and it is still a missing persons investigation, with input from highly trained major crime and forensic investigators.
Police also interviewed community members and those closest to the children
www.theglobeandmail.com