Is it permissible to perform a hymen repair surgery without informing the fiancé or family after a rape incident that led to the tearing of part of the hymen?

If your cousin committed this heinous act, he has disobeyed his Lord, wronged others, transgressed, and severed ties of kinship.

You did well by trying to fend him off. We hope that you did not make any concessions that might have contributed to this, such as an unlawful seclusion (khalwa).

The general ruling is that hymen repair surgery is impermissible due to the Shariah prohibitions associated with it. However, if you fear harm such as abuse, beating, or men abstaining from marrying you, then it is permissible out of necessity or need.

You should conceal yourself and not inform anyone about the matter.

As for istibra' (ensuring the womb is clear), it is done by three menstrual cycles, which is the view of the majority. It is permissible to adopt the view of those who hold that one menstrual cycle is sufficient in case of need.