Hello and thank you for the opportunity to assist you. There might be a slight
delay between your follow ups and my replies as I am typing out my answer, or taking a quick break. Please remember that this is general information only - not legal advice - so no attorney-client relationship has formed.
I am sorry for your daughter's situation. Actually, she can proceed as planned and divorce. Just because he is re-married, does not mean that she cannot divorce him still.
In fact, his marriage
is void because any marriage without a prior divorce is void. But this does not change anything - if he's already signed the papers, she is to simply go through with the divorce as needed.
I hope this finds you well. If you still need information, hit reply
so we can chat more until you are satisfied. If you are satisfied, please
do not forget to conclude the question. You may always come back to it to ask a follow up free of charge. If you feel I went the extra mile, a bonus would be appreciated. You can always link to my profile for another question at a later time: www.justanswer.com/law/expert-elyJD/