A Night of Desperate Ladies

You reach forward and start pulling her hands away. She resists briefly before relenting. She immediately starts slowly leaking but you quickly stop it by pressing directly on her peehole and she softly gasps at the added pressure.

"There, now you don't have to worry about losing it."

She starts to protest but quickly gives up. Instead, she starts squirming around to where its hard to keep your finger over her opening. Soon you realize why - your finger is also partly pressing her clit and her gyrating is stimulating it further. She starts getting really turned on, you can fell her pussy getting wet, and not just from piss.

She soon starts moaning and grinds hard into your finger. It seems like she is about to cum, but you aren't quite ready for this to end.

What should you do?