Can wife claim for maintenance if husband allows her to stay with him

1) My father started living separately from us since 2012 in the 1st floor of the house constructed & owned by him. 2) My mother(unemployed housewife, with no property/flat written in her name by her husband) and me live in the ground floor. 3) He does not pay any maintenance to her (I financially look after her) 4) Can my mother claim maintenance in spite of the following : 1) husband has allowed her to "take shelter" in his house despite separation 2) husband allows her to use "his" fridge, washing machine, sofa, stove etc. 3) Looked after by me(i.e her son)