Shar Jackson attends the Bing Bar on Jan. 21, 2011 in Park City, Utah.

*Shar Jackson — Kevin Federline’s OG babymama — is responding to news that her famous ex, who has also sired children with Britney Spears, has gotten yet another woman pregnant and is expecting his fifth child.

“Honestly, I wish them the best, without question,” Jackson, 34, tells of Federline and his current girlfriend Victoria Prince.

The actress, who appeared to have worked out all of her issues with Federline on VH1’s “Celebrity Fit Club” when both were in the cast, is taking a zen-like approach to the baby news this time around.

“It’s just not part of my life,” she told People on Tuesday at the launch of Silver Jeans Co. at M. Fredric in Studio City, Calif. “I’ve got my own family to worry about, I can’t really be worried about what’s going on with anybody else. Good for them, and of course I wish them well.”

Shar Jackson and her children in 2007. Donnie and Cassie (now 20 and 16); and her two youngest with Federline, daughter Kori and son Kaleb (now 9 and 7).

The mother of four – two of them K-Fed’s – says she’s somewhat bemused when people ask her about Federline’s news.

“People have been asking me what I think, or if I have a comment,” she says with a laugh. “And I’m like, ‘Yeah, I have a comment. I need to go home and cook for my own kids!’ “