No,
Be very nice, wait until he is out, pack her things quietly and flee, preferably to another province.
The police won't do anything except give useless advice and the beatings will start again as soon as the police leave.
This is the problem, they want to be all grown up and have kids and then cannot cope with being adults, (because mentally they aren't), so they resort to the tantrums that always got them what they wanted when they were kids