On her face

As Harley thrusted into her mouth forcefully from the power of her impending orgasm, she was unaware of a turned on watcher hiding on the rooftops waiting for the perfect moment to make an entrance

"Oh yeah, do it Mr. J, do it. All over my face!", Harley screamed in a lust-filled voice as she imagined it was her lover, the Joker cumming all over her face (regardless of his penis only being 4 inches). The cum sprayed like a backed-up fountain as Harley let out her first orgasm with a penis all over her face. As the last drops landed on her chin, there was a soft thud near Harley.

"Hello there Harley, I see you've made some milk for me to lap up", Catwoman said in a sultry voice with her suit's zipper being lower than usual. "This is going to be fun".