i've heard it said ( or did i read it once?) that women use 2 things to make other women jealous and to show what they have and they don't
1) the size of their engagement and or wedding ring and
2) if their pregnant, meaning some women love to go around showing themselves off as being pregnant especially if their man is rich, handsome, built and so on, basically showing other women and making them jealous to see that they got knocked up by this type of guy and the other women didn't.
i would think though the third thing is ( the size of their house and their other material possessions)