Hey, no problem.
Easter Egg refers to a "bonus" picture (or, on a DVD, a feature) not ordinarily listed. It's a challenge to find these sometimes and there are many well known ones in the DVD market, and websites that tell you how to find them.
Patty has occasionally added an extra image (or two) to her photo sets between updates, and gives clues in her Forum on how to find them. It's a little game, a nice break from the usual, and reflects her playful nature. The pictures are usually up a notch compared to the normal teasing style but it's not a gynecologic exam.
Alice In Wonderland was a Pattycake photo set with an easter egg. I can't find that one right now, but here's the one from Soak It Up, one of my favourite sets from her: