As sad as that is, they can't really be mad at each other. Neither have the moral high ground.
The two options I see are letting it strengthen their relationship with the reminder that they're still technically into each other on a non-physical level, or take it as the huge red flag of lost trust and think about splitting.
The two options I see are letting it strengthen their relationship with the reminder that they're still technically into each other on a non-physical level, or take it as the huge red flag of lost trust and think about splitting.