It's in the book Not Just Friends ... twenty pages or so... Glass explains it and offers advice on how to process...

NO ONE here will suggest you are unreasonable in the wake of an addictive affair no...

Once the affair is OVER you may want to think about extending more custody, but the child's safety is the first and foremost concern... And if you have been on this forum for a while you will know its NOT a good idea leaving a child in the hands of an addict pursuing a sleazy affair... They are selfish, wreckless, and destructive... And your child shouldn't be exposed to that