The family of missing Penrith woman Cheryl Ardler are approaching their third Christmas without her and hoping a $100,000 reward will help bring her home.
Ms Ardler, who would have turned 44 earlier this month, was last seen in Cranebrook with a man known to her in early December 2012.
Police and her family say they have no clue as to what happened to the mother and grandmother, and are treating her disappearance as suspicious.
An inquest is scheduled for March.
"I'd love not to go to the Coroners Court. We want to find Cheryl and bring her home for her family," Detective Inspector Grant Healey told reporters on Thursday, announcing a $100,000 reward for any information regarding her disappearance.
"We have no information which is the hardest thing for the family because we just don't know."
Cheryl's mother Irene Ardler made a public appeal for anyone in the community who knows anything to report it to the police no matter how small.
Christmas is a time for family, she says, and the family just want her home.
"We are hoping there are more people out there who may have seen Cheryl around Christmas time three years ago, in 2012, or can give our close-knit family some answers about her disappearance," she said.
"Someone in the community, in the aboriginal community, must know something (about) where Cheryl is."
Her sister Tracey urged anyone who was involved in Cheryl's disappearance to "find it in your heart" to give her back.
She described Cheryl as a happy-go-lucky person who always cared for others.
Det Insp Healey said even the smallest piece of information could be the key to solving the mystery.
Checks of bank accounts and Facebook pages indicate no activity by Cheryl has occurred since the last sightings in December 2012.
"No-one just disappears. Somebody has information," Det Insp Healey said.
