It is not uncommon for women to show earlier in subsequent pregnancies, especially with their third child. This can be due to various factors such as changes in the abdominal muscles, increased relaxation of ligaments, and the uterus expanding more quickly. Additionally, each pregnancy is unique and can vary in terms of how the body responds and shows signs of pregnancy. If you are concerned about your early showing, it is always best to consult with your healthcare provider who can provide personalized advice based on your specific situation.