What does Caesar's decision to go to the Senate House against Calpurnia's wishes reveal about their relationship?

Caesar disregards Calpurnia's fears because his ambition is greater than her portents of the future. Caesar is superstitious to a point, but he can't afford to be that superstitious. Caesar is a leader and commander first and foremost, and he cannot be dissuaded from "one more battle" by a woman, even if she is his wife.