Is K-Fed Feeding It to Grandma?

He's over Britney -- but does K-Fed have a thing for Sean and Jayden's grandmother?!
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Britney is reportedly pissed off at both her ex-hubby and her mom, Lynne, claiming that they teamed up to force her into rehab -- but are they teaming up in the bedroom as well? Kevin and Bean from L.A.'s KROQ are helping spread the rumor with a new "K-Fed" jam called, "Milf Does a Body Good."

Finally, a K-Fed track we're supposed to laugh at.