Breaking My Own Rules…

…but it doesn't count, because it's not about writing, not mine at any rate.
Over at Jessewave JL Merrow got a nice 4.5 star review on her novella, A Calling for Pleasure . It's a title she got back from the publisher and decided to re-self-publish, and asked me if I could help with the cover design. We kept the font from the original and changed everything else.
To my surprise and delight, the cover got a brief mention at the end of the review: "The cover artist, Lou Harper, has a sly sense of humor. Giggle: look closely."
Can you spot what she meant?