I live in central-ish London in a pretty busy area. I was taking DS out of the car earlier and noticed a woman being chased by a man. He stopped her and held her back from running further. She didn't say anything or attempt to get away. They started walking back the way they had came, with him kind of pushing her from behind. It was very odd. I let them know i was watching and asked if everything was ok, he answered 'yes, ok'. She looked at me but didn't make any signs that she needed help. I'm not sure she spoke english, I think they were chinese.
I'm a bit freaked out by it and not sure if I should have done more. What would you have done?