So eager was he to hear his father's appraisal of what he described as an "ugly" performance, Betham phoned his dad from the middle of the ring just moments after being announced as the new title holder.
"He was at home. I gave him a call while I was still in the ring, so he had his critique," he said.
"There were some fair points...but let's say he wasn't as impressed, but I got the job done."
Betham was satisfied having got through his first 10-round fight but believes he has much to improve on.
"You live and learn from that. I want to get in there and go again and defend the title, potentially against James or someone else.
"I enjoyed the card tonight, it was a quality card, and I'd like to be a part of more of these."
In the main event, New South Wales State of Origin and Cronulla Sharks NRL captain Paul Gallen extended his professional fight record to four wins after beating Warriors back-rower Bodene Thompson in the celebrity feature bout.
Gallen praised his rival who tested him over four rounds with a range of powerful shots and evasive footwork.
"I knew from the start it would be tough," he said. "It's definitely different fighting a southpaw but forget about that - he was evasive and hard to hit.
"Everyone told me he was as fit as a fiddle and I heard a few whispers that they were quietly confident that they were going to win and he'd done a lot of sparring. We both had to dig deep but I got the win."