The Morrison Mary was being possessed by one of the furies, she was also in black (think it had something to do with Black Adam at the time, like she was Black Mary?), Diana beat her by snapping her arm and holding her down on the ground. Diana was stronger there, but Mary did cut her and she became the first victim of the anti-life equation.
Zaldrīzes Buzdari Iksos Daor
But she does. Also how do you think she did stuff like tackling a train going at top speed with her body totally unharmed without having super durability? Or taking sun rays, Or electric attacks or hits from other characters with super strength. All of this was during Marston run.