This weekend, Natalie and partner Adam Cottrell were reportedly involved in a domestic incident which saw Cottrell arrested on suspicion of assault by beating and criminal damage.
Speaking to The Sun, the actress's dad claimed that Cottrell punched a hole in a microwave oven when Natalie refused to return home after a row last weekend.
"Natalie had come here at the weekend. I don't know her fiancé very well because I don't see him often," Charles explained. "Natalie and the baby came here, we spent Saturday together and had lunch.
"On Sunday she told him on the phone she wouldn't be going back and we heard this crash in the background. He'd put his fist through the microwave."
He added: "I'm just worried for Natalie and for my granddaughter. She's the most lovely baby - really happy. It's not the situation you want when there's a young child."
It has been reported that Natalie has called off her engagement to Cottrell following the weekend's events.