Rob Kardashian and Blac Chyna may not be pregnant — yet — but they sure look like they're having fun practicing. Being parents, that is. 
Days after rumors hit that the couple might be expecting one of their own, Rob was spotted looking every bit the doting step-dad to Blac's son, King Cairo, whose father is her ex — and Rob's sister Kylie Jenner's current boyfriend — Tyga.
The cute "family" celebrated Rob's 29th birthday at Legoland in Southern California. They rode the slides together and Blac Chyna captured some video. See below:

Now, how Tyga feels about this is a whole 'nother story. So far, the rapper has kept mum about Rob hanging out with his son, and hopefully he won't pull a Future and start a social media war with his baby's mother now that there's a new man in her life. We all remember how the EVOL rapper reacted to seeing his ex Ciara's man Russell Wilson pushing his son, Future Jr., in a stroller and performing other kinds of daddy duties — explosive!
Despite all the drama, all the players in this game of relationship musical chairs seem to be committed to keeping the peace, and it would be a shame if that changed just as we were starting to get used to the idea of this crazy dysfunctional clan.
Recent reports claim that Rob is looking to start a family of his own with Blac sooner rather than later. "He's seriously, seriously considering getting Blac pregnant. He wants a son. It's what his father would have wanted," a source says. 
From the looks of it, he'll make a great dad someday.

While we wait, take a look at the growth of Blac Chyna and Rob Kardashian's relationship in the BET Breaks video below:

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