canine, once a couple is divorced, they are considered as strangers. the same halachas that apply to a random man and woman on the street apply to them.
truth be told, really? divorce is rarely justified? i’m pretty sure you don’t know the inside story on most divorces. before anyone takes a drastic step like divorce, they think it through very thoroughly. no one wants to be in that situation, no wants that stigma attached to themselves. but when a marriage is intolerable, the only option is divorce.