Is it permissible not to inform the husband that the hymen was removed by coercion, and if he finds out, is it obligatory to inform him of the truth?

There is no harm in not informing the suitor about the loss of virginity due to fornication. Euphemism can be used if he discovers its loss, as there are many reasons for the loss of virginity other than fornication.

Two matters should be noted: 1. If the suitor stipulates virginity, it is not permissible to conceal its loss from him, but he should not be informed about the act of fornication. 2. The cause of falling into fornication is often leniency in its preliminaries, such as complacency with seclusion and displaying oneself (tabarruj). Therefore, attention and caution are necessary.