1997 Divorced Michael Jackson and Lisa Marie Vacation in South Africa with Joe, Katherine, Omer
In October 1997, after they had divorced, Michael Jackson and Lisa Marie vacationed in South Africa where Joe Jackson and Katherine Jackson also attended. Michael also brought, who I believe is his secret son, Omer "Michael" Bhatti along. Lisa Marie's children were also on the trip.
At this link you can watch the video I did on their history before the marriage.