Kylie Jenner took the stand on Monday (April 25) in the Blac Chyna v. Kardashian trial, and she testified about warning her brother Rob about dating Chyna after hearing about her being violent toward Tyga, who shares a child with Blac Chyna. 

Kylie stated that Tyga once showed her a six-inch-long scar on his arm, which he told her was a result of a violent knife attack. Kylie added that Tyga confided in her about Chyna allegedly abusing drugs and alcohol, which Tyga says led to the attack. 

Kylie stated that she told Rob about Chyna being violent toward Tyga, and she added, "I felt it was my duty to express my concerns, but ultimately it was up to [Rob]." Kylie was also asked whether she thought Chyna's love for Rob was genuine, and she responded, "I just felt maybe me dating the father of her child had something to do with it." Kylie then responded to being asked if she thought Blac Chyna was dating Rob out of spite, to which she responded, "Maybe." 

Source: TMZ