A mother whose three children and father were killed in a car crash has shared a holiday message that warns against drunk driving.

Nine-year-old Daniel, five-year-old Harrison (Harry) and two-year-old Milagros (Milly) Neville-Lake were killed when their minivan was hit by a suspected drunk driver in September. The children's 65-year-old grandfather Gary Neville also died.

On Monday, their mother, Jennifer Neville-Lake posted a photo on social media of a mall Santa holding a portrait of the deceased children and one of Gary.

“My Santa photo featuring my kids and my dad,” she wrote on the Facebook post.

On Sunday, Neville-Lake also posted on Facebook warning against impaired driving.

The post featured another photo of the deceased children as well as the words, “Please be safe everyone. I don't want anyone else to go through this.”

My Santa photo featuring my kids and my dad. Thanks Jon for braving the malls to get this for us.

Posted by Jennifer Neville-Lake on Monday, December 21, 2015

Please be safe everyone. I don't want anyone else to go through this. Please share.

Posted by Jennifer Neville-Lake on Sunday, December 20, 2015

Both posts have received hundreds of likes and shares along with messages of support from commenters.

Marco Muzzo, 29, is facing several charges in connection with the crash, including impaired driving causing death and dangerous operation of a motor vehicle causing death.

Muzzo appeared in a court in Newmarket by video link on Dec. 10 where the hearing was put over until Jan. 6, 2016. Muzzo was told he will be required to attend the next court session in person.

The allegations have not been proven in court.

Muzzo is part of a family that owns a construction empire estimated to be worth more than $1 billion. The family owns Marel Contractors, based in Vaughan, which operates in Toronto, Ottawa, Calgary and southwestern Ontario.