A:
If the situation is as you mentioned, and your sister’s husband is indebted and cannot repay his debts, the priority is to use this money to settle his debts and to postpone your sister’s Hajj. Settling the debt of your sister’s husband and relieving their distress is more important than helping her to perform Hajj, and more beneficial to them. Hajj is not obligatory for her until she can afford it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.