I want to collect a room fee for my niece

My house has a house, divided into 4 rooms for rent, each room costs more than 3 million / month. In order to build a house, my family pays nearly 10 million dong in principal and interest in the bank.

Since the house was built, my house has been lived by my grandson next to my husband's house for a year. Because of the increasing spending in the family, I want to reclaim my room or want my child to pay a little for the room, especially about half of the room I am renting, but my husband disagrees. According to you, should I ask for room fee because she is already working and earning income.