All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
There is no doubt that your parents-in-law have a great right on their son, and Allaah paralleled his right to the right of the parents as He says (interpretation of meaning): {Be grateful to Me and to your parents; to Me is the [final] destination.}[31:14]. His parents experienced hardship because of him. His mother carried him in her womb and spent sleepless nights because of him, and did everything to nurture him. His father was also exhausted in earning the daily bread to provide for him. No matter how much money he gives to them, he will never fulfil their right on him. You and your children also have a right on him. It is confirmed that the Prophet said: "It is enough sin (i.e. to destroy a person) on a person to neglect those who are under his guardianship." [Abu Daawood]. So we advise your husband to seek to fulfill the rights of his family and be kind to his parents according to reasonable limits. His brothers should also participate in being kind to their parents. We advise you to help your husband in being dutiful to his parents and in running the affairs of his home. This may make your husband give you more consideration, and lead to improved marital relations between you and him. Being kind to his parents could be a reason of gaining one's daily bread, and having his earnings blessed, and a reason for your children becoming righteous.
Finally, we would like to draw your attention to the following matters:
Firstly, be careful not to let this matter become a cause of separation between yourselves.
Secondly, it is your husband who gave this money to his brother as a loan, and he can ask for its return or forgive it.
Thirdly, residing in a non-Muslim country is not permissible except for a necessity.
Allaah knows best.