Are we entitled to demand that our mother pay the remaining amount for the apartment, which is estimated at 570,000 liras, at the exchange rate from 3 years ago, equivalent to 47,500 Riyals, due to her failure to pay the amount entrusted to her?

Pledging a house for usufruct is not permissible because it constitutes usury (riba). Similarly, according to the majority of scholars, it is not permissible to demand more than the exact amount borrowed, without considering the depreciation of the currency, although it is better to account for the depreciation of the monetary value to avoid scholarly disagreement. A mother's disposal of her son's money without needing it is not permissible, and she must repent. She is only required to repay the amount transferred to her in Syrian Pounds. If an agreement was made to repay in another currency, it should be at the exchange rate on the day of repayment. She should also take into account the change in the value of the currency. Furthermore, one must observe proper etiquette and self-restraint when speaking with one's mother.