Tenant increasing the no of residents in the property

Can a tenant increase the no. Of residents in the given property? (Nothing about this problem is mentioned in agreement but I don't want the increment in no. Of people). Earlier 3 people were living(when the floor was given to them), Now 4 have started living. And when I deny them for more people, they say that we are paying for whole floor, it's our wish to keep as many people. But I gave the floor on seeing that there are only 3 people. We have an official court agreement of 1 year but nothing about the no. of people residing is written in it as i thought it was obvious that only three of them will continue living, and didn't pay heed to add that point in the agreement.