Squatter in Home - Any other way to remove her than eviction?

[Tracie Van]

I am asking this for someone else. 

An elderly woman was allowing a temporary guest to stay with her. The women was homeless and living in a hotel with her 8 year old daughter. Homeowner she felt bad and offered a temporary stay. Rent free. No written agreement. Now squatter won't leave and its become a very very tense situation. Squatter is threatening to call social services because she isn't allowed to use the kitchen. The home owner had to file an eviction against her, which  I am pretty sure is her only recourse at this point. Correct?