My fiancé gave me a sum of money toward the mahr (A mandatory gift of money, property, or valuables that a Muslim groom must give directly to his bride upon marriage) before the marriage contract was concluded, and I spent this money on myself at his request. I then traveled to join him in the country where he was residing, in order to conclude the marriage contract. However, Allah, the Mighty and Majestic, took his soul due to illness [before the contract could be concluded]. Am I required to return the amount he gave me toward the mahr? And do I have the right to deduct the expenses I incurred as a result of my travel to him — such as the cost of the plane ticket, accommodation, and unpaid leave [from work]?