Trespass

I have filed divorce on cruelty and dessertion, after she left me 2.5 years, once summons is issued to her, she did not receive that, instead she went to my parents house( which is in different town), broke the house lock and entered inside and started residing there, the house is my father's self acquired property, when we went to give complaint on trespass to police station, they did not take instead they say she is ur family member in this condition as per law what is true? Will it be a trespass or not? Pls clarify