My father gifted his house (situated in West Bengal) to me unconditionally one year back. i am residing in pune for job purpose but my father do not want to stay at pune as he belong to WB and want to stay there. due to ill health of my mother they move to sister's house (married) two months back. now my sister and her husband wants the property back and trying to harass me. my father is retired railway employee and getting pension of Rs 17000 per month and free treatment @ railway hospital.
Now my question is
1) can they file maintanance case under senior citizen act,2007 without asking me for maintanance for the purpose of harassment or to get the property back? Please note few days back i had offered my father financial help but he said it is not required (i have proof on that)
2) How it would be decided that they can maintain themself with their monthly pension of Rs 17000 or not ?
3) Can my father claim back his property on this ground even the gift deed was unconditional ?