Blac Chyna's Kool with Kylie

Blac Chyna and Kylie Jenner have buried the hatchet and there's no animosity over Kylie playing stepmom to Chyna and Tyga's son King ... so claims Rob's fiancee.

Sources close to Blac Chyna tell us she actually enjoyed the pics of Kylie and King at a mini-golf course.

We're told Chyna's good with the entire Kardashian brood ... a brand she's personally growing -- she's weeks away from giving birth.

She's also not stupid and knows Kylie will become her sister-in-law and if she starts picking fights with her, Kris will side with her daughter, which will cause Chyna financial and other problems.

The Kardashians are also on board ... they've invited Chyna to family events ... most recently the latest DASH store opening and Kris' mom's birthday.

Chyna knows which battles not to pick.