Republican Senate candidate Sean Parnell, right, walks to a courtroom at the Butler County Courthouse for the second day of his child custody trial on Monday.

The estranged wife of U.S. Senate candidate Sean Parnell testified Monday that their family went on vacation together after she said he struck and injured one of their children in February 2018.

Testimony in the trial between Parnell and his estranged wife, Laurie Snell, for custody of their three children ages 12, 11 and 8 continued Monday in Butler County Common Pleas Court.

Snell testified last week, and Parnell's attorney completed cross examination Monday morning before Parnell took the stand in the afternoon. Testimony could conclude Tuesday.

In her testimony last week, Snell accused Parnell of striking one child hard enough through a T-shirt to leave welts.

Under cross examination, she said she didn't report the incident to authorities or seek medical attention for the child, and the entire family went on vacation following the incident.

She testified about a May 2018 incident in which an angry Parnell punched a closet door, which flew open and hit the face of another child, leaving a bruise.

On Monday, she said she witnessed the closet door incident, but only heard the other incident.

Her petition for a protection from abuse order against Parnell based on those allegations was denied in June 2019.

Parnell's attorney asked Snell if she thought Parnell was a good father.

“When he's not angry, yes,” she replied.

She also testified last week that she had endured years of rage and abuse from Parnell, including once being choked until she had to bite him.

Parnell testified that he helps his children with their school work, takes part in play and extracurricular activities including sports and music, countering Snell's argument in her custody complaint that he only gets involved with the children when it benefits his campaign.

He said he has spanked their two sons once or twice as discipline, but has never spanked their daughter.

“Laurie's anger and resentment toward me is clouding her judgment,” Parnell said.

Parnell is endorsed by former President Donald Trump in the contested Republican primary to replace Sen. Pat Toomey, who is not running for re-election, in the 2022 election.

Primary custody of the children is at stake in the trial, but Parnell said he hopes he and Snell can resume shared custody, as they have now, if he is elected. He said he would continue living in Western Pennsylvania if he wins. He said he wants her to be involved with the children.

He testified that Snell signed up one of the children for tennis and soccer without telling him, even though their shared custody order from the court says they must agree on the children's activities. He said he found out the child was in soccer halfway though the season and learned about tennis on the day of the last game of the season. She also enrolled a child in futsal over his objection, he said.

Snell objected to him taking the children to his grandmother's funeral, but eventually relented, he said. When he dropped the children off at her home after the funeral, he said he found the family's cat in a cage in the driveway with a bag of cat food on a cold night. He said he and Snell argued, causing the children to cry. When he left, one of the children took the cat back inside, he said.

Those are among the many disputes and disagreements that he said took place after they separated in 2018.

The Associated Press contributed to this report.