Is it obligatory for a suitor to break off his engagement to his fiancée who works in a usurious bank, has a car loan and a bank study loan, and is being demanded by the bank to pay or face imprisonment if she wishes to resign?

Your fiancée has committed several forbidden acts: The first is her working in a usurious bank, as it involves aiding in the unlawful, and the Lawgiver has cursed the one who consumes usury, its giver, its scribe, and its two witnesses. The second is her borrowing from the bank with interest, which is the usury of pre-Islamic times concerning which severe warnings were revealed. If they compel her to repay the entire loan if she leaves the job, then she must pay the money to avoid continuing to work, even if it means borrowing from another source or selling non-essential items. If she is unable, then there is no sin in her continuing to work in the bank out of necessity, while seeking a permissible way to rid herself of this job.