Nia Long and Ime Udoka are done -- the couple of 13 years has reportedly broken up after the Boston Celtics coach's affair with a team employee.
The news comes less than three months after the Boston Celtics suspended Udoka for the entire 2022-23 season for violating team policy ... a public scandal that Long said was "devastating."
As TMZ Sports previously reported, Udoka had an inappropriate relationship with the Celtics' travel planner ... who was in charge of booking Long's flights to attend home and road games -- as well as her arrangements to move to Boston permanently.
The fallout was apparently too much to recover from ... as People reports the two sides have called it quits on their relationship and are now focused on co-parenting their 11-year-old son, Kez.
Long recently sounded off on the Celtics for airing out their dirty laundry ... saying, "I think the most heartbreaking thing about all of this was seeing my son’s face when the Boston Celtics organization decided to make a very private situation public."
Udoka remains suspended from the Celtics ... but was rumored to be Steve Nash's replacement at the head of the Brooklyn Nets bench. The team ultimately decided to go with Jacque Vaughn.
Long and Udoka first met in 2010 when the ex-NBAer was a member of the Sacramento Kings. They were engaged in 2015 ... but did not end up getting hitched.