I'm not sure that you sitting and crying about your daughter's situation is very helpful to her. I understand you are worried about her but she has enough to deal with without having to worry about your devastation. With the right support she will get over this.
To be honest with you, it is quite possible that it is not all over yet with her ex. It may well be that he is experiencing great pressure and guilt over the end of his marriage along with the effect on his child. Men can often feel dispirited in these situations and feel they have to tow the line. Years ago I was in a similar situation and after a brilliant New Year's Eve my boyfriend finished the relationship on New Year's Day because of the pressure he was getting from his ex wife. I was devastated at the time but it wasn't over until several break ups more. That wasn't over his ex-wife but because I realised he wasn't worth the trouble!
You have to give your daughter time to grieve and then gradually help her to rebuild her life. In time she should look at this as a new beginning in her life, look at her options and seize any opportunities with both hands.
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