Dealing with a Child of the Affair?

A visitor to this site recently noted that she hasn't found much info on this site related to dealing with a child of the affair. That's largely because it wasn't my experience so I don't have much to offer. And it's SUCH a difficult situation that I can scarcely imagine how painful it is. However, Phoenix often weighs in with what's happening in her life and has articulated so beautifully her struggle to manage her pain while not poisoning her own children against their half-brother. 

You there Phoenix?

Anyone else with thoughts related to this? 

Thanks, as always, for any light you can shine for one of our secret sisters.