There are no leaked photos of Kylie Jenner kissing Cody Simpson, as far as I know. The two celebrities dated briefly in 2011, when they were both teenagers, but they broke up soon after. According to Simpson, he and Jenner remained friends after their split, and he even attended her 16th birthday party. Jenner later moved on to date rapper Tyga, while Simpson had relationships with Gigi Hadid and Miley Cyrus.
As for what mom Kris Jenner would say, I can only speculate. She might be supportive of her daughter’s choices, or she might be concerned about the media attention and the potential impact on her family’s brand. Either way, I’m sure she loves Kylie and wants her to be happy.