It probably wouldn’t be a blatant obvious head on thing. First thing you might pick up on are the dirty looks or rolling of the eyes. Then either an adjustment of their tops, bras, or boobs in the bra cups. Next the light grazing or bumping from their sides, a natural busty woman is going to wanna know if the other has implants or not. Lastly the forward bump a true MAYBE or a forced introduction with a hug . If they already live on the same street, complex or dead end street they have been watching each other. Even women who are somewhat “ friendly” I call it love/ hate relationship have been comparing or giving verbal jabs for a while, but you can bet they are all trashing each other behind others back. I myself arch my back and adjust to display more cleavage when anyone who is a D or bigger is about and they do the same of me. Another give away is the fashion, notice who wears the deeper designed V cut top/ dress or scoop cut or sweetheart cut to show and emphasize their proud cleavage and bust. If you want to really see go people watch in warmer weather or indoors till it is warm, watch their faces, posture, eyes and body language, it reveals a lot and not just busty women but all women get a hint of jealousy around others and new faces.
