Hi Hunter,
They lie about their age in the hopes of attracting someone within the age range that they are making others believe they are in.
She is actually 52 but saying she is 45 in the stat area because she knows the computer algorithm of the dating site will then use that information to send her matches within the 45 year old age range.
She probably started with stating her true age in her stats. However, she got the attention of older men that she just didn’t find attractive or appealing. She then changed her age in the stat area so as to get better results with younger men.