To all the gentlemen in this thread who have said that they would swap seats with a woman in a similar situation - thank you. It's good to hear those things!
And trying to stay on topic - someone earlier in the thread asked if the woman who made the complaint said anything to the captain - can you do that during a flight? I know for most of you that will sound like a silly question, but I'm still a novice flyer compared to most people here.