Devin Booker's offseason of love is still going strong ... 'cause after a romantic lake trip with Kendall Jenner, he sipped booze with the model at a lunch in NY -- and, yeah, the NBA star sure looks smitten.
The attractive couple hit up a party for Jenner's 818 Tequila brand at Sunset Beach Hotel on Shelter Island on Wednesday ... with Booker playing the role of proud BF as he watched Jenner celebrate the success of her alcohol.
Booker was seen smiling, laughing and schmoozing with Jenner's friends ... and we're told Kendall couldn't have been more happy to have her tequila with her man by her side.