Where did I quote her? In the SIXTH POST in this thread. I'm unsure if you are skipping posts or illiterate, but I'm inclined to lean towards the latter. I also noted there is not a description of how she has been dressed at games, and if you can't understand that I don't know what to do for you. Referring you to Reading Is Fundamental may be a start.
Unless you can post some evidence of how her "dress sexier" is somehow inappropriate, you are condemning her out of sheer ignorance. We also don't know if there is in fact a "PTO dress code" or if she using that as a figure of speech; I've never seen one for any sporting event I've ever attended, and the PTO doesn't control anything in any event. Sexier may be heels; may be nylons with a pattern; may be a skirt instead of blue jeans; but YOU DON'T KNOW WHAT IT IS in this instance.
If you're looking to argue silly points on the internet that don't affect either one of us (maybe dictionary.com would be a good site for you also), go bark up another tree. Quit wasting my time.