Kendall was first spotted spending time with Los Angeles Clippers player Griffin in August.
Earlier this month, a source told that things were starting to heat up between the two, who were originally reported to be keeping it casual.
HOUSTON, TX – APRIL 25: Houston rapper Travis Scott and Kylie Jenner watch courtside during Game Five of the Western Conference Quarterfinals game of the 2017 NBA Playoffs at Toyota Center on April 25, 2017 in Houston, Texas.
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