As regards to if Katy can sue Mutual of Omaha to enforce the contract, the answer is that she can sue Mutual of Omaha because she is a donee beneficiary.
Katy is listed as a beneficiary even though she is not the one that was insured.
This means that she can still claim the life insurance payout and if Mutual of Omaha refuses to pay up, they would be in breach of contract and can therefore be sued.
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