Washington, Jan 20 : Kevin Federline is serious about his new volleyball star lover, according to his ex Shar Jackson.

Britney Spears'' former husband has been spotted with sexy Victoria Prince for weeks, but has yet to comment on the blossoming romance.

However, the rapper/dancer former girlfriend Jackson, who is mother to two of Federline''s children, has revealed the romance is for real.

"I met her (Prince) once and she was really cool. But that's as far as I want to get involved in that. But the kids have spent a little time with her and thought she was pretty cool. So that's all that matters, as long as they think she's cool," Contactmusic quoted Jackson, as telling HollyScoop. com.

Recently, Jackson told Life & Style magazine, "If I decide to date someone, it will be a while before my kids meet that person, and it''s the same with Kevin." (ANI)