sorry but i have a couple of questions

-what if the children died too , can the parent remarry then ??

-what if i inherited the house to a son (or a daughter) then he/she married , then he/she died(without having any children) , can the wife ( or the husband) remarry and continue or not because he/she is not from the family ,( i mean the son/daughter will then be displaced from the family tree of his/her own family) ???