It's the kind of clothes that mothers and daughters can wear, in terms of concept... It's not about age. It's about taste, and it's about lifestyle. I believe women of all ages can wear anything.
A lot of it, as it is in any job in life, is being in the right place at the right time.
What you need to do is get that tape measure out, and start measuring that gut. Then you start working out and you start eating properly till that gut gets down close to it was when you were in your 20's. Then you'll find out what your weight should be.