my girlfriend lives in braintree massachusetts in a home that is listed as a single family home that is really an inlaw setup. she occuppies the downstairs which has two bedrooms. Upstairs there is three bedrooms with two single women and a married couple occupying it. The rent was origanally divided by five,$380 per bedroom, this was not determined by the landlord, it was an agreement among the roommates. The married couple decided that since there was two of them that the total rent would be divided by 6. so my girlfriend's rent was $633.33 out of $1900 for the past year. Recently the two single women moved out leaving the married couple the whole upstairs of the house which is 2/3 of the entire house. Now that the married couple has the entire upstairs to themselves they want the rent to be changed back to being divided by five. This causes my girlfriend rent to increase $130 more a month. The utilities are also divided the same as the rent. This leaves my girlfriend paying more money for no more space and the tenants upstairs will not allow her acess to the laundry area. She has a seven year son and is facing eviction because the tenants refuse to pay anymore money. The landlord wanted all the tenants to give their rent to one person which that person would give to the landlord (FX Messina)in a single check. She gave the married couple her usual $633 rent check which they deposited in their account and are refusing pay pay the landlord because they don't want to pay the $130. They are also refusing to return her money. She is facing being evicted because of this. What can she do?