Tenant overflowed water from the toliet which caused water damage to the dry : How to handle this situation.

[James Park]

Last Friday, my tenant calls me to tell me that it is difficult to afford the $2175/month rent. She is on a two year contract. In order to not have my property empty while looking for a new tenant, I agreed to let her to pay me $1800 a month/month (which she told me she can afford) until i can find another qualified tenant who can pay $2175. Today her mom overflowed the toliet by flushing it twice where the water has caused damage to the dry wall on the ceiling. Who is responsible for the cost of repair the landlord or tenant. Now I cannot market my townhome for a new tenant until the dry wall is fixed. At first I thought the tenants intentionally did this so that I cannot market my property, but my gut is telling me it was an honest accident. Any advice is welcome for my situation.