Khloe Kardashian PICTURE: Instagram

Stepmom Khloe?

Khloe Kardashian's boyfriend Tristan Thompson has become a dad. 

The 25-year-old basketball star's former girlfriend Jordan Craig gave birth in Los Angeles earlier this week and Khloe chartered a private jet to ensure Tristan was able to get there from Cleveland, Ohio, in time for the birth.

A source told X17Online: "Khloe's really understanding about Tristan's situation - she's a little embarrassed that her boyfriend is having a baby with someone else, but it happened before she hooked up with Tristan. She wants him to be a responsible dad, but she wants to keep it all on the down low."

Khloe, 32, discovered that Tristan was having a baby with Jordan, a cousin of Kevin Hart's wife Eniko Parrish, after they started dating, but decided to commit to the relationship anyway.

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A source said at the time: "Khloe and Tristan are doing really well. They are exclusive. There is a lot of chemistry between the two of them and they are happy together."

And things are so serious that Khloe sent some of her clothes to his home in Ohio as she plans to spend a lot of time there during basketball season, cheering on the Cleveland Cavaliers player.

A second source added: "Tristan told Khloe about the baby. He's happy about it.

"Khloe's having fun with him right now and just doesn't want any drama."

And Tristan has gotten the seal of approval from Khloe's mother Kris, who previously said: "They are really cute. You know, she's having a good time. He seems like a really nice guy."

When asked what makes them work, Kris replied: "I don't know! I think just with any relationship, just in life, I think it's about chemistry and about values. You know, about how two people get along, know how that goes!"