Shar Jackson and Kevin Federline
Scott Kirkland/INF; Denise Truscello/WireImage
Shar Jackson says her ex, Kevin Federline
, is holding up well during the ordeal with Britney Spears.
"He's good," Jackson, 31, told PEOPLE on Thursday at the GBK luxury suite in the Beverly Hills Thompson Hotel. "I talked to him the other night and he's fine. He's just happy that the boys are safe. That's his biggest thing, making sure that the boys are in a good place and that they're happy. And they're happy.”
Federline, 29, now has sole legal and physical custody of his sons with ex-wife Spears – Preston, 2, Jayden, 1 – following the pop singer's meltdown
. A hearing is set for Monday on whether to resume Spears's visitation rights.
Jackson, who has two children with Federline – Kori, 5, Kaleb, 3 – has remained close to her former boyfriend, speaking with him "all the time," she says.
Jackson says that for the sake of the boys Spears should focus on her own needs right now.
"I'm just one of those people that believe you need to take care of yourself before you can take care of anybody else," Jackson says. "My only advice would be take care of yourself. If you need help for whatever reason, go get it. Do whatever you have to do for those babies."