Re: old love
This is definitely a sad situation.
What I recommend is that she should not take her old memories along to her new house. This will not be too healthy for the new relationship.
She has to forget it. Admit it or not. If she keeps remembering her ex-husband and wishes to live happy, this will absolutely not be possible. Forgetting will not be too difficult as it was hardly a few months.
Get on with life. Forget the past. Make a new beginning. You loved that guy way before your marriage.