Among Shar Jackson's guest list for her 32nd birthday party (her b-day is actually September 4): fertility family, friends and K-Fed.
The father of four – including two children with Jackson – was at Las Vegas's Blush Nightclub on Friday helping his ex celebrate.
"We were friends before we were a couple and we're always going to be," Jackson said. "We have two amazing kids together. Kevin is my boy."
She's not kidding. Their reunion came only a few hours after the two hung out together in a VIP cabana at Tao Beach with friends and family.
Shar Jackson, who K-Fed dumped for Britney Spears while pregnant, insists there is no \rekindling the flame. "We have passed that stage."
Jackson's party was the first stop for Kevin Federline in night that saw him dropping by newly opened Lavo, Tao and Prive Las Vegas.
After seeing each other for the third time in 12 hours, Federline took a break from partying at a table in the club's kitchen, then headed to the deejay booth to publicly wish Jackson a happy birthday into a microphone.