What if Stevie was high that particular day and she attacked Lindsey first when he said he didn't want to tour and stuff? Maybe he hit her AFTER she hit him? I dunno.
Just a thought...
Lindsey pushed Stevie against a car and slapped her, but he MIGHT have done it because she was being crazy or something, trying to calm her down?
I'm not saying he was right in hitting her, I'm just wondering what caused this man who is most definitely NOT a violent person to hit Stevie.