I sort of agree.
It's important to realize that getting child services involved can end up being quite damaging to the child if she is not abusing him. A child needs a mother, and father, but sounds like he already does without the father. Taking away his mother is serious. Not sure about Canada and how they do things, but I would think there is a decent chance this could happen.
If you could swing it, the best case scenario would be to get them both some counseling and have professionals do what they are trained to do. First in order of importance is to not cause more harm.