The man was trespassing on her emotions!
Women as independent and career-minded as Miranda didn't just bump into a total stranger and fall in love. Ridiculous. Impossible. Totally unthinkable. There must have been some other more logical explanation for her extraordinary reaction to Ben Frobisher.
The computer expert had already made quite an impact on the small English market town, and the fact that he'd reduced Miranda to a giddy teenager only fueled her determination to remain detached. True, she found him incredibly desirable, but did he have to invade her dreams every night? Did he have to reveal emotions and needs she had never before experienced?