Stimulate

Rosa remembered something she came across a few weeks ago and went back to Dana's bedroom. She opened the bottom drawer of the night stand and found it: a vibrating wand

She went back to Dana, turned the wand on, and shoved it between her thighs up against Dana's pussy. The ropes over Dana's thighs held the wand securely in place.

Dana squealed into the gag.

"What will happen first?" asked Dana in her fake voice, "you orgasm or you piss yourself?"

Dana squirmed in a vain attempt to dislodge the vibrating wand, but it was held firmly in place.

Rosa gave a deep laugh and patted Dana on her head.

Dana realized the voice was right, she was both getting turned on, and she had to pee.