So, it is unlikely that her leaving will have any ramifications regarding her eventual divorce. However, regarding custody, possession is 9/10s of the law. So, if she leaves the kids with him for any length of time, that could work against her.
Marital misconduct is a factor in determining alimony, but it is only 1 of 17. It is rarely significant. Moreover, that only applies up until the date of separation. If she is living separate and apart under the same roof, she is already separated and leaving would then be a post separation event which cannot be considered. It certainly is not considered in temporary alimony, known as Alimony Pendente Lite, Alimony Pending the Litigation (APL).
Finally, even if he were to seek a fault divorce, which has no purpose and is an utter waste of time and money, he must be the innocent and injured spouse. By your description, he is not.
I trust that answers your question but feel free to call or e-mail on a free initial basis.
Answered on Jan 11th, 2013 at 11:46 AM