Let ' s say they did take about it . They agreed they weren ' t ready for kids . They used protection and then agreed to use plan B , and if all else fails , they ' ll split the cost of an abortion . And then Jane changes her mind . Is Tom still responsible ? If that is all they agreed to then Tom is definitely responsible . It was a verbal agreement with no discussion of what happens if there is no abortion i . e . Tom is not financially responsible for the child . He knew he had no way to enforce it or even show what exactly was agreed to . I thought it was IF I decided to have an abortion you would pay for half . The decision to have an abortion was not made yet . Tom ' s rights were not violated because he asserted no rights in an agreement he can ' t definitely show what exactly was understood by both parties . Even if you say they agree to get an abortion . She doesn ' t get one and has a child but the agreement doesn ' t specify what happens after . No one agreed that Tom has no financial responsibilities if Jane breaks the agreement . Just because Jane broke the agreement , it doesn ' t mean that Tom gets any he can think of that is not in the agreement .