Ja Morant held his sister down on Valentine's Day, hooking up his younger sibling with a brand spankin' new Jeep Wrangler ... a car she's wanted forever!
The Memphis Grizzlies star -- one of the most electric players in the league -- captured the heartwarming moment on video, posting a clip surprising his younger sister, Teniya, on his Instagram Monday.
Morant and Teniya were hanging out in a parking lot when a brand new white Jeep -- with a red bow -- pulled up, and her reaction was priceless!