My mother has expired last month .Now we have a flat at Kolkata which is jointly owned by my younger brother & my mother and my sister lives in that flat with her husband . My mother had in her will which is registered , mentioned that after her death her share of the flat be given to my sister . Now can my brother make my sister to vacate the flat and sell the same . Also is probate mandatory if registered will is there ,as making probate is a costly affair . Also Can probate be made at a later date as cost is too high . .Lastly Can my brother sell the flat without my sisters consent, ignoring the will as probate is not there as of now .pls kindly let know