so far i dont see any problems,i asked about the ground for annulment as in some cases the respondent is the wife,which is harder to prove custody if the wife is psychologically incapacitated...but in your case your fiance is the petitioner and the child of 5years old is living with her so theres no need for another court hearing to prove sole custody,its proven anyway after the annulment papers is done...

yeah she will still need CENOMAR but dont worry if the previous marriage still reflects,the database will be change as soon as she sents a copy of her recent marriage certificate in the NSO.