Chyna, 28, shared a video on Instagram, dancing on "Juju on That Beat" and lip-syncing the lyrics "You ugly, you yo daddy's son", while approaching her son King Cairo.
The model later giggled, indicating that she was just kidding. However, Tyga apparently did not find the joke funny.
"Tyga is not cool with Chyna calling King ugly, joking or not. He thinks Chyna's a really good mother, but made a big mistake with saying what she did and then an even bigger mistake by posting on social," a source said.
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