EXCLUSIVETMZ has obtained a photo of Janet Jackson and Jermaine Jackson in a heated exchange at the Jackson family home-- shortly after Sheriff's deputies responded to an alleged battery there Monday afternoon.
In the pic, Janet and her brother Jermaine are in front of the Calabasas compound ... clearly engaged in a heavy conversation.
We're told the photo was taken within the same hour LA County Sheriff's deputies went to Katherine Jackson's home ... after one family member accused another of a physical assault.
The Sheriff's Dept. isn't saying if Jermaine and Janet were the ones involved in that dispute.
As we previously reported, Janet and Jermaine have a lot to discuss -- the letter they and 3 other siblings signed, demanding the Executors of Michael Jackson's Estate step down ... and Katherine Jackson's puzzling trip to Arizona ... a trip some claim is a brainwashing mission.