Should I intervene in a friend's messy breakup?

A friend’s marriage has broken down after she discovered her husband was having an affair. He offers no financial support, or help with their children. Should I get involved?A friend of mine is married to an old school friend, and they have two small children. She discovered he was having an affair two years ago, and his refusal to acknowledge the hurt and betrayal of this has led to the permanent breakup of the relationship. He is now barely supporting her, although he earns much more. He