Too many women spend their 20's chasing after "Prince Charming", not realizing that Prince Charming has lots of options, and can easily replace the current girlfriend when she makes too many annoying noises about commitment.
Then she hits her 30's, and starts looking through the nice guys she rejected in her 20's, looking for one who will still be interested in her high-mileage assets, but still being resentful that she had to "settle".
Pity the poor, dumb male that marries this woman. She will make his life a hell on Earth whether as his wife or, worse, his ex-wife. Then he will REALLY be screwed.