BRITNEY and K-Fed relight old flame while discussing visitation but hold the wedding bells, a source says This may be hard to believe, but a usually reliable source very close to Britney Spears says the entertainer and ex-hubby Kevin Federline may be getting back together. Apparently the time the former couple have been in touch regarding Spears' expanding her visitation rights with their sons has reignited strong feelings between the two. Spears also was very touched by K-Fed's interest and concern about her younger sister, as Jamie Lynn Spears became a mom herself last week. According to the source, a Spears-Federline recoupling ''wouldn't come as a big surprise,'' though don't hold your breath for a second trip down the aisle for the twosome. ''Let's see how this goes ... but something is definitely again cooking there.'' There has been no comment from spokesfolks for Spears or Federline.  - Chicago Sun-Times