Kylie Jenner and Tyga dated for three years and broke up in 2015. There is some speculation that Tyga cheated on Kylie and that is why they broke up. Well in the "Keeping Up With the Kardashians Reunion Show" Andy Cohen asked Kylie what was her relationship with Tyga. She says that they don't talk (which is expected) but if they bump into each other they're cool and she always wishes him well. I think it's been long enough since breaking up that they can be cool.