Answer: Wendy
Step-by-step explanation:
Wendy married Peter on the condition that his father would give her a million dollars for it.
They even drew up a contract/written agreement to that amount.
Wendy then fulfills her end of the bargain by marrying Peter.
Peter's father as the other party to the agreement now refuses to meet his.
He has broken the terms of the the Agreement so if she sues, she is likely to win.