Tense holiday with ex Keith Urban

“Nicole has very mixed feelings about having to spend time under the same roof as Keith again, but she is determined to do it for the sake of her girls,” the source said.

If RadarOnline.com readers know, the Baby girl star and the country singer, 58, share two daughters, Sunday Rose, 17, and 14-year-old Faith Margaret.

“The girls have barely seen Keith in the last six months while he was touring and they were abroad with Nicole,” the insider said. “They miss him terribly, and while they try to stay strong, Nicole knows what they really want: some normal family time.” So she has promised to do whatever it takes to give them that.”

According to the insider, the children were blindsided by their parents’ split.

“As far as they knew, their parents had a solid marriage, so it was a difficult adjustment,” the source said.