Gleaming looked from her wife to the potion in her hand and back to her wife.  
“When you said you wanted to spice things up I thought you meant different positions not magical potions. What does this potion even do?”
 
Cadance just smiled and kissed Gleaming on the cheek  
“Oh that’s part of the fun, and I know you’ll love this just as much as I’m going to. Now drink up so I can bring in the rest of the surprise”
 
Gleaming trusting her wife wouldn’t do anything to hurt her drinks the potion. She then starts to feel a tingling sensation within her breasts, before they start to grow. It starts out slowly but soon increases in rate as her breasts just get bigger and bigger. Gleaming can’t hold in a moan as the sensation of her breasts growing dials her sensitivity up to eleven.
 
With the growth coming to an end Cadance can’t help but admire her wives new breasts and give one of the nipples now larger than her hand a bit of a squeeze, causing Gleaming to let out an even louder moan.  
“From the sounds your making I take it you’re just as happy with the results as I am. Now for the second part of your surprise, you can come in now” she shouts over to the door.
 
The doors open and standing there is Queen Chrysalis. She licks her lips hungrily as she stares at the site in front of her.  
“Oh Cadance you’ve out done your self, this is most definitely going to be a fun night”