sibling - a brother and a sister
cousin - the child of your aunt/uncle
nephew - a son of your brother/sister
mother in law - the mother of your wife/husband
son in law - the husband of your daughter
sibling - a brother and a sister
cousin - the child of your aunt/uncle
nephew - a son of your brother/sister
mother in law - the mother of your wife/husband
son in law - the husband of your daughter