With Debbie Rowe set to testify in the Michael Jackson wrongful death case, lawyers are wondering what she might reveal under oath about his kids' paternity.
Lawyers for Katherine Jackson have been making a number of inquiries on the eve of the trial, in which the family attempts to win billions from AEG Live.
Katherine's legal team worries that Debbie will testify Michael is NOT the biological father of Prince and Paris Jackson, which has long been rumored.
Because Debbie Rowe knows the most about Jackson and the paternity issue, the family worries this could hurt their case as well as their privacy.
They're worried AEG may try to prove the two older kids don't actually have any legal ties to the late icon, which could torpedo their damage claim.
Debbie is on the witness list for both Katherine and AEG Live - the latter having already deposed her without asking a single question about paternity.
Still, Katherine's lawyers have already filed legal docs asking the judge to exclude any evidence of paternity. The judge has yet to rule on the motion.
Under California law, when a woman gives birth while married to her husband, the husband is presumed to be the father, unless he's sterile or impotent.
Kim Kardashian knows this all too well, as Kris Humphries would currently be presumed to be the father of Kanye West's baby as it stands now.
As for who the biological father actually is, if it's not Michael? His longtime friend Dr. Arnold Klein has often been the subject of speculation there.
MJ's youngest son, Blanket, was born to an unknown surrogate. The star's biological paternity has been questioned in the youngster's case as well.