Hello, Anonymous.
More information on the specifics would be beneficial to give a better answer. For instance, are they married? Or are they just living together? Is your daughter the mother of all three children?
The answer to some of these questions may change some of the responses here, but for the most part, it would seem that, at minimum, your daughter is in a tenant-landlord situation. I say this assuming that they are not married, all the children are hers, and the house was bought solely by the father with no help, contribution, or assistance from your daughter. If it does come down to a tenant-landlord situation, then there are very specific and thorough processes that must be followed in order to evict someone. She may have rights under tenant law. This doesn't mean she can never be kicked out of the house, just that it will take time, and all the legal steps must be followed.
Additionally, she should probably seek the help of an attorney to help get the paperwork filed to commence a case for custody and support of the children. This way the court will be able to spell out the rights and obligations of both parties, as well as make sure the children are provided for in some way.
I hope this helps.
(This answer does not create a binding attorney-client relationship and should be used for information purposes only.)
Answered on Jun 10th, 2015 at 1:10 PM