YANBU I know where you're coming from. Girl in my class did this quite deliberately I think. We were all in the same group as law students, group of friends. We all did much the same things in life as you do, getting a boyfriend, splitting up, meeting the one you married, graduating, career, children, back to career on some basis or other once possible.
She never worked. The nicest guy in the class was mad on her but she kept turning him down and kept him hanging. None of us could understand why. Then she trained as a personal trainer, quickly got together with one of her clients, a much older man, balding and paunchy, but with money. Moved in with him, married, she did sports (but not so that she could have lived on the income) for a few years, then just swanned around for a bit, before having kids.
Before she had kids, every time you met her and asked her how she was (you would have to bump into her in the shops because she didn't bother to keep in touch), she would very quickly get into the conversation the words "I live in X Road" (the most expensive road in our city). Now its "My kids go to X School").
Do I respect her? Not one bit. You also get the feeling she would use you for as long as you were useful to her, then spit you out like a piece of used chewing gum. She set out to get a man with money, when she was quite capable of working herself, ended up with a physically quite repulsive one - what sort of person can do that? She was quite pretty, but we all were at that age, but even the one who did modelling part-time to fund herself through uni still works now, as do those of us who have husbands who are well paid enough themselves.