her philandering babydaddy Tristan Thompson at the first birthday bash for their daughter True on Sunday.
The 34-year-old reality star and the Canadian 28-year-old stood about six feet apart as they sang happy birthday to their child beside the cake and other goodies.
The seemingly amicable exes split after Tristan was caught kissing family friend Jordyn Woods at a drunken February 19 party at his house.
It was the Cleveland Cavaliers center's third cheating scandal after canoodling with 'strip club worker' Lani Blair a year ago and three other women in October 2017.
The 6ft9in athlete also has a two-year-old son Prince Oliver with ex-partner, Fashion Nova spokesmodel Jordan Craig.