What Took Ya So Long?

Her expression is loaded with nuances. Embarrassment struggling with delight. A little bit of annoyance, but the mouth is clearly configured to say "Oooooo", an exclamation of surprise and excitement. She grabs the towel and immediately hides her breasts, leaving her posh backside completely exposed to the peeper.  

Very appropriate illustration for a card of the "clubs" suit.

Source: Retrogasm