What is the ruling on a khulʿ (divorce initiated by the wife) that the spouses agreed to postpone for six months? Does it take effect, and what are the implications?

Khul' is the separation of a married couple in exchange for compensation taken by the husband. This results in an irrevocable divorce (baynunah) by agreement, such that the husband cannot return to the wife he divorced through khul' except with a new marriage contract. For khul' to be valid, acceptance must occur within the same session, the party requesting it must not retract their request before the other party accepts, and the acceptance must conform to the offer. The aforementioned khul' did not occur due to the failure of the three conditions: First, the husband's acceptance of the khul' did not take place in the session. Second, the wife retracted the khul' before the husband's acceptance. Third, the acceptance differed from the offer, as the wife requested an immediate khul' while the husband accepted it as delayed.