Blac Chyna Is Pregnant! Rob Kardashian and Fiancee Expecting First Child Together

"She would have preferred to have announced it on Mother's Day herself", a rep for the model tells PEOPLE, "but her hand was forced".

Tyga, who is now dating Rob's sister, Kylie Jenner, took his toddler on an adventurous father-son play date on Friday, and judging by the photos, he doesn't seem to be at all fazed by the shocking baby news. She's already mom to son King, 3, who she shares with ex Tyga.

The source also stated that the couple will soon start "getting one of the rooms in Rob's house all ready for the baby". The timing of the announcement is interesting, considering Rob Kardashian has been known to have a rocky relationship with his mother, Kris Jenner. Is anyone in the family a huge fan of Blac Chyna?

Ironically, the news of the couple's engagement also hit headlines while the rest of the family was on a break in Vail, Colorado.

Chyna revealed via Instagram on Friday (May 6) that she is toting a gut full of her fiance Rob Kardashian's seed.

The 27-year-old confirmed last month that she was engaged to Kim Kardashian's brother.

Even Tyga got in on the celebration, offering a note of congratulations on Chyna's Instagram post. Now that the news is out, many are wondering about the Kardashians' reaction to Blac Chyna's pregnancy.

The spokesperson claimed that Chyna believes the baby news was leaked by someone on Rob's side of the family in an attempt to promote Keeping Up With The Kardashians. And, we're still trying to figure out what this newborn baby is going to call Tyga and Kylie.

The Kardashian-Jenner family tree is about to get real complicated. No, not really. But they will love that baby so much.

Blac's attorney revealed that she is: "very happy and very excited" about the news.