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.
The husband and wife have the right to lead a marital life and be able to live without being harmed or disturbed. Therefore, the spouses are not obliged to accept the wife's parents to live with them in the same marital house, especially when the situation is difficult. For more benefit, please refer to Fatwa 86334.
If these parents ask the spouses to dwell with them, then one should be wise in dealing with them about the situation. Firstly, one should seek Allaah's Help in doing so, and then the help of their relatives in order to avoid any bad consequences and problems.
Allaah Knows best.