Kylie Jenner thinks Rob Kardashian's relationship with Blac Chyna is "unhealthy".
The 19-year-old reality TV star has admitted it's become increasingly hard for her to support Rob's on/off relationship with the 28-year-old model, who is the mother of his five-month-old daughter Dream.
Kylie - who previously dated Chyna's ex-boyfriend, rapper Tyga - said: "It's really hard to support a relationship that's really unhealthy, especially when it's hurting my brother and now it's affected me.
"I just wish they could just stop this kind of roller-coaster ride."
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