Q: A husband has divorced, and returned to, his wife twice and then divorced her
for the 3rd time, should she observe waiting period then? Knowing that he did
not practice coitus with her for the last 18 months and there were no physical
contact between them during the same period.
A: For the waiting period to be obligatory after the 3rd divorce it is enough
that the marriage was consummated before the first divorce. Also, she becomes
ḥarām for her first husband unless she gets married to another person
permanently and has vaginal intercourse with him along with all conditions
mentioned in the chapter of divorce [of the books on practical laws of
Islam]. Then, if the 2nd husband divorces her, she can marry the first one.