Section 2(1)(iii) in The Ministers (Allowances, Medical Treatment and other Privileges) Rules, 1957
(iii)'family' means except in relation to the rule in section IV a Minister's wife residing with him and legitimate children and step children residing with and wholly dependent on him. Not more than one wife is included in a family for the purpose of these rules. If the Minister is a married woman, 'family' will include her husband residing with and wholly dependent upon her;