Insurance — Uninsured motorist — Identical policies issued by same insurer to mother and daughter who lived in the same household, with mother’s policy providing UM coverage of $100,000 per person and daughter’s policy providing UM coverage of $25,000 per person — In action against insurer by daughter to recover for injuries she sustained in accident with uninsured motorist while driving her own vehicle, it was error for trial court to enter summary judgment finding that daughter was entitled to UM coverage equal to the higher limit provided by the mother’s policy — Daughter was not covered under UM provision of mother’s policy due to exclusion in mother’s policy which provided that “There is no coverage for an insured who sustains bodily injury while occupying a vehicle owned by any resident relative if it is not your car”