You got that photo off internet where it is mislabeled. That is her stepdad and mother. There is another photo of all 5 of them. The man on the end is holding her mom. That would not happen when the parents are divorced. Her dad whom she looks just like including chin is posted above.
Yes, that is her birth mother. Looks like both bio dad and bio mom might be part Filipino or such. That would be ‘coloured’ under Apartheid.