Rights of legally married second wife

We had 4 properties .one secured from ancestral line for my mother ,two purchased by mother and father respectively.one poroperty with a house was in the name of father and mother .1981 my mother expired and got married to my mothers sister legally in the same year.during 1990 my father did partition and all the properties distrubuted to my sisters except one wirh house.he made another document in the same day and gave house with some portion of property to me and balance retained in his name.this document is not consented by any one and he mentioned that he and his present wife (second wife ) will stay till death and she will have all rights to movable and immovables in that property and i can get ownwership only after their death.in 1995 father regularised the above document duly making another document clubbing portion of land kept in his name and got consent from my sisters too.now father expired and step mother stays there.she has her own properties in her name and no issues in this marriage.my doubt is as the properrty is secured bymy mother and is she eligible to stay there .can i transfer that property to my childredn without her consent ,pl clarify