If she told him to go get help, then the door is already opened a crack, so he does have a chance. Who knows, if she told him to go, he might stand a better than 50/50 chance of keeping her.
If he is doing this on his own, then I would put the odds lower...a LOT lower.
This is horrible, if what I know to be true. It is sad to see this happen right after such a boost in her career. I am refereing to Jesse James sleeping with another woman.
She has my heart from her performances. I hope she can be happy with her success.
This a good example of all the success in the world counts for nothing when there is failure in the home. This has already started to affect her career - she canceled appearances / interviews and do notice that cheating usually happened when she was away for a long time making movies. Being married to a popular actor is not easy on a relationship.