Final answer:
Kathy will likely be successful in her lawsuit against the estate for the $10,000 because there was legal consideration in the promise made by her father.
Step-by-step explanation:
If Kathy sues the estate, she will probably be successful, as there was consideration.
In contract law, consideration means that each party must confer a benefit on the other or suffer a detriment at the other's request. In this case, Kathy's agreement to postpone her wedding was a legal detriment she suffered at her father's request, and it constitutes the consideration for her father's promise of $10,000. Her father's benefit was the peace of mind knowing his daughter would not be distracted during her first year in law school, though in legal terms, Kathy's detriment is sufficient to establish consideration.
The death of Kathy's father does not terminate the contract; instead, the contract is binding on his estate. As per contract law principles, unless the contract includes a provision that it is not to be enforced in the event of one party's death, the obligations typically bind the estate.