Like Amber, Greg had a tendency to get in the kids' faces and yell, but it was worse. He was no better than Amber. He happened to be more aggressive. He also interrupted his wife when she wanted to say something. When Jo tried to smack some sense into him by using a timer, he said that he didn't want to do the reasonable talking technique.
Greg was 44 years old and now he is 52 years old in 2017.