The rumors about Sharon and Randy are as old as the accident itself. Simple fact of the matter is that,at the time, Ozzy was still married to his first wife and in the process of divorce. Since Ozzy and Sharon were not married at the time, an "affair" is impossible.
They were not the only two on the plane,either. The seamstress on the tour, Rachel Youngblood, was also a passenger on the plane. Randy also had a girlfriend in LA.
No,we will never know what really happened as all parties involved were lost in the crash. Perhaps Randy was invited by Rachel and was not aware that the bus driver/pilot had been doing cocaine and had not slept that night. Speculation leads to more unanswered questions, but the one true answer is that we lost a divine talent that day, and for some the anniversary of that day is spent pondering that which could have been.
Ozzy knew Randy was the key to his solo success, and would not have cut off his nose to spite his face. It changed everything for Ozzy, and he stopped having a band, resorting to hired guns.