"Um, thank you for returning me back to normal...", Mary started with a light blush on her face because she was in front of a total stranger almost unclothed, "...but having a male see us like this is kind of embarassing for us, you see." "Ah, yes", the waiter nervously replied, obviously somewhat aroused. Suddenly, Mary took the Gender vial and put it at his mouth, making him swallow a gulp. After a few coughs and wheezes of the liquid being forced down his throat, the waiter stammered "w-what--" "Don't worry, it's only temporary...we'll change you back afterwards", Mary reassured him.
The waiter's sharp jawline and muscled body quickly faded into a much softer posture, losing some height in the process until he was roughly as tall as Mary, and beneath his shirt he could see small bulges on his chest slowly inflate to a moderate B cup, and his body hair was completely gone by now. "What's happening to me", he shrieked in a much higher voice than before. "Sorry, but we just don't like men peeking...we'll change you back in a moment." A few strands of long brown hair started hanging across his changed face, and the hair touching his nose produced a short and high-pitched "hatchoo" before the big change started...
He felt his parts practically melt as they quickly pulled up into his body, leaving nothing but two large folds on the outside and a small point which was the effective remainder of his, now officially her, penis. "Now that we are sure we aren't watched by any strange men", Mary giggled, "we'll get poor Jess here changed back to normal." Mary started getting out the Human vial and heard the new waitress say in the background "aw, bit of a shame actually...it's quite the cutie widdle pig" and she walked over to Jess, giving her a good petting. "Oh boy", Mary thought, "only female for less than a minute and she's already having an overdose of hormones." She decided to wait no longer and administered the potion to Jess, who promptly started to lose the fat, tusk and hooves, until she was finally completely back to human. Not staying around bare naked, she hurried off to put some clothes on.