Answer: The simple answer is no. The laws of physics never ignore you, regardless of your age. If you eat fewer calories than you burn, you will lose weight. Most studies show a relationship between aging and weight loss, but the culprit is not age itself or a slowing metabolism. Decreased movement is the biggest reason for easy weight gain as you age. Women tend to eat similar amounts as they did when they were younger, but tend to exercise less.
You can slightly alter your lifestyle to include more movement from not only traditional exercise, but also by changing the way you perform everyday activities that burn calories such as standing/pacing versus sitting whenever possible, parking further away from your destination, taking stairs more often, etc.