[svandamme]

I think the mum tried to get him to stop in a rather poor way, i do think she tried to prevent worse , eg she hit once, so he wouldn't hit more and harder....
If you listen, the vid starts with her saying she already had punished her, in an attempt to prevent him from doing worse

I know, it's not perfect, but in the video the main problem is the guy.
The woman probably was abused as well, so try to look at what she tries to avoid...
i don't think she condoned it, more like she was stuck between a rock and a hardplace and did what she thought would not make it worse.