MSN.com: Britney wants another baby — with the same daddy. Despite the widely reported woes in the marriage between Britney Spears and Kevin Federline, Spears is eager to give their son Sean Preston a sibling — “the sooner the better” — according to In Touch Weekly. “Britney was advised to wait at least three months after her baby’s birth before trying to get pregnant again,” a “friend” told the mag. “Now that that’s passed, she wants to try right away.” Spears reportedly is hoping for a girl this time around, and is actually thinking that another baby will help smooth out her rocky relationship with Federline. “She is hoping another baby will strengthen her marriage to Kevin,” another friend told the mag.