downstair neighbor is aggravating my tenant

[Louis Reza]

I rent out a upper unit condo The downstair neighbor is aggravating my tenant and myself.My tenant is moving out because of her I have had the police involved and don't know what else to do the association has been involved to and they informed me that her place is in forclosure so I realize why she is bitter.She also is mad at me because of some water damage that happened water heater leaked in her condo a couple years ago.I was going to fix the damage to her unit (ceiling,drywall and paint)3x3 area then she came to me with a $2600 bill for a new furnace I told her I will hand this over to my insurance and long story short the bylaws for the condo say i'm not liable so you could imagine how this all has come about.Ihave tried reasoning with her but its to the point now were I just don't want her talking to me or my tenants.Any help would be appreciated.