She's in a different stage than you are but that doesn't scuttle the whole relationship forever. It just means that you need to know that she is not ready yet, but maybe when she is, you will seill be available.

Eventually, it will settle itself for her just like it does with all of us. Either she will never speak to him again or resolve her lingering issues or maybe jus tget the business part of the divorce over with. OR she will realize that her continued connection with him is making her unable to mvoe on and she'll either explain it to you in a way that makes sense (our parents are best friends forever and we've been business partners & will continue to be forever but he's gay & I've come to terms with that so it's more like he's my brother than anything else, something like thhat)... or she'll cut off contact with him.

But for now, stay her friend, provide support the way you'd do if she were a member here, and remember that ALL of us eventually are ready to move on. It just takes longer for some than it does for others.