To tell or not to tell

Here is a little sample of the type of drama that "Madam X" (a very close co worker of mine ) has to deal with daily:
The father of your childern is married to a woman (and I use this term loosely due to the fact she can barely drink legally) you know is cheating on him. The silly girl has actually gone out of her way to tell you that she and one of her "men" had so much rough sex while her husband was away that they "literally broke the couch". After depositing that useful nugget of knowledge in your lap, she spends all of the money that was supposed to be your child support, refuses to get a job, and tells you that your children are "technically not my responsibility".
(My only question at this point is not IF to tell but how soon can she tell!)
Well, she managed not to say anything for a few months but now that the children are starting to suffer it's a whole new ball game! It was all I could do not to crack up when she called her (for lack of a better term) baby daddy (sorry Madam X) and told him the whole story! We are expecting a call with an update of his marital status shortly....
STAY TUNED!!!!