First responsibility goes to the Son/s where paternal right is applicable. But maternal right, is different. However, the constitution implies upon the male children with or without involvement of the in-laws. The interest where to stay belongs to the parents and their likings in respect of property. Neither daughters nor sons need to take away, nor come and stay with them.
In maternal cases, Uncles and nephews were responsible by generations. Property was under possession of the girl-children and male children were getting one share among all the number of members. Paternal was contrary, girl-children, after marriage, had no right and during marriage all rights were disposed off to her. However, the present Law belongs to equal right for sons and daughters (without any right toin-laws). Once the share was given specifying that it is the share, it would be over.
In the above case, as long as parents are alive and without 3rd party involvement, 1st preference is for the interest of the parents, especially when they become senior citizens.