If James Harden slept with an Australian student shortly after hooking up with Khloe Kardashian last month, he may have had a good reason.

OK! Magazine is reporting that Kardashian is pregnant, and the father indeed has NBA blood lines, but it's former husband Lamar Odom, not Harden. Ironically, the divorce between the couple became final on Saturday, some two years after she filed for divorce from Odom, who was struggling with sobriety.

James Harden accused of cheating on Khloe Kardashian

According to reports, Kardashian still is in love with Odom but didn't think she could make it work with him.

"I will never ever not love Lamar," she told E! Online earlier this year in the midst of a fling with French Montana. "I'm obsessed with Lamar in a great, healthy way. He was my husband, and I still wish he was, and I don't think there's anything wrong with that."

James Harden's not dressing up to go out with Khloe Kardashian

OK! reported that Kardashian hooked up with her ex after partying with Harden earlier this month in Las Vegas. OK! added that Kardashian didn't have sex with Harden in Vegas but did with Odom. But that information seems unclear because the Vegas excursion with the Houston Rockets star reportedly took place over the Fourth of July weekend, and it likely would be too soon to tell if Kardashian were pregnant.

Not ironically, Harden and Odom were both spotted in Las Vegas the next weekend at the same nightclub, but Kardashian was not there.

"The fact is, she would consider being exclusive with James if it weren't for Lamar," the source told OK! "All Khloe and Lamar ever wanted was to have a family. After getting over her shock, she told friends she couldn't be happier."

Hollywoodlife.com added that Odom reached out to Kardashian, asking for another chance.

" 'He wrote that he loved her and asked if there was any way she could ever forgive him after everything he's put her through,' says the source. 'She didn't say yes off the bat, but she told him she was willing to give him a chance.' Then came the visits, according to the outlet. Khloe jetted off to Vegas to see him multiple times, while dating James Harden! One thing led to another and soon Khloe found out that she was pregnant!"

OK! added that Odom is "committed to his sobriety and he's vowed to stay on the straight and narrow," the insider says.

Harden was not quoted in any of the articles.