Is it permissible to buy a refrigerator for one's mother with money that is suspected of being unlawfully acquired, knowing that the questioner is not obligated to spend on her?

Unlawful wealth must be disposed of by spending it on the poor and needy. It is permissible to give some of it to a poor and needy relative, such as a poor mother. She may be given from it according to her needs to purchase a refrigerator or other necessities. However, if she is not poor, it is not permissible to give her from it.