Except he doesn't, not really.
He says all the right rhetoric, but fails to introduce any hard policies that will back up what he's saying. He does, however, use it as an excuse to insist that families staying together is the best way to combat this problem, and restates his intention to back this up with hard policies like the married tax allowance.
Way to go Cameron. Completely fail to take into account that there's a bloody good reason that many women leave their partner's why don't you. Not to mention the ones who just got left in the first place. Forcing people to stay together will achieve nothing but a lot of misery and some desperately unhappy children.
How do they always manage to turn something that sounds female friendly initially into a covert attack against women achieving independence and equality. Grrrrrr.