For a large portion of my teens I had a raging crush on my older female cousin who was perpetually single.
Being around her was an insane turn-on, to the point of me masturbating to fantasies of me and her for hours after every time we saw each other. She was not overly attractive and clearly not a model, but she was still quite physically desirable. She could pull off the sexy secretary look perfectly though.
What is worse is that there was probably some kind of mutual attraction as she had no issue doing things like offering me alcohol underage and would almost exclusively sit nearby me and talk to me at family events. She was also almost a decade older than me, but looked very very young for her age. I am 100% sure that if we had been able to get away with fucking we probably would have.
she looked similar to picrel except with brown hair, a significantly narrower face, and was almost completely flat chested.