Is it permissible for the groom's family to demand material and moral compensation for the period of their son's engagement (after the marriage contract) in the event that the engagement is broken off by the bride's family?

If a divorce occurs before consummation, after a marriage contract that fulfills all its pillars, the wife is entitled to half of the named mahr (dowry), based on the verse: "And if you divorce them before you have touched them and you have already specified for them an obligation [of mahr] - then for them is half of what you specified." She is not obligated to anything else, whether moral or otherwise. However, if the marriage contract did not take place, the wife is not entitled to any financial or moral compensation.