>>1951896>the realization that she's a little bit of an exhibitionist makes her feel more embarrassedThis is where it loses ENF. It doesn't matter that she's more embarrassed because she's not actually more embarrassed from being nude, she's embarrassed from being aroused. She's literally less embarrassed about being nude now because she's less focused on it. And rather than escalating the ENF factor, this situation usually just results in her throwing out all reason and stopping to masturbate in a public area that she was desperate to get away from just 5 seconds ago, and then all of her thoughts afterward either being about how aroused she is or about how embarrassed she is that the situation makes her more aroused than embarrassed.
Some ENF content can improve exhibitionism stories, but exhibitionism content in ENF stories tends to shift the focus away from ENF. It can certainly be done well, but it almost never is.