Chris Watts, Shanann Watt's husband, spoke to 9NEWS and said the situation's been traumatic.
"I'm just hoping right now that she's somewhere safe..." he said. "Like, this house is not the same. Last night was traumatic. Last night was - I can't really stay in this house again with nobody here."
He glowingly described his girls - Celeste, 3, and Bella, 4.
"Celeste. She's just a bottle of energy," Chris Watts said. "She's - I call her rampage because she's got two speeds: go or she's sleeping. Bella. She's the more calm, cautious, mothering type and she's more like me - she's more calm."
He said he hopes the kids are OK.
Pregnant woman and her 2 children reported missing in Frederick