A person who you thought you could trust pressures or coerces you, and you're ambushed. Later on, you might think how you could have done something different. But at the time, you are caught off guard.
I read a part in Sarah Palin's book, and although I disagree with her on a number of policy issues, she does have excellent social skills. And even she was caught off guard! It was the night of the election or the day after, and she and Senator McCain must have known they were probably not going to win for the last week or so, and they were going to speak to their supporters for the last time. Basically, they were going to thank their supporters for all their hard work.
First off, the McCain people told Sarah she was not going to speak. That threw her off her rhythm. Then they told her she couldn't bring any of her family members up on stage even though Sen. McCain was. That was the far more serious issue, but she was kind of numb from the first issue (my read) that she didn't really see and feel this issue.
She should have said, 'No, I stand with my family. I go with my family, or I don't go up on stage at all.'
But she didn't. She was caught off guard. So, even someone with the excellent social skills of Sarah Palin went along when she should not have.