Concentrating on transferring your chest to the reserved looking girl as you couldn't transfer to Clara, and you weren't comfortable thinking about the slutty girl's chest you pressed the button. The pressure and load on your chest lessened, but you started hearing some high pitched squeaks and as you looked away from your flattening breasts. Her squeaks turned into small moans as her growing chest was being constricted by her somewhat restrictive clothes. Her training bra which was all she had ever needed was the first to really snap under her coat and shirt.
"Too tight!" she groaned.
"Woah, don't worry babe I'll help you out!" Clara said as she tried to help her friend take a coat off. She unzipped the coat to reveal her button up shirt. With the coat off the girl sighed as some of the pressure was released, and as she relaxed and stretched causing the boob pressure to release as a button or two popped off showing off plenty of her cleavage. Even more panicked she tried to hide her boobs under the table, but just moving vertically downward got her boobs caught on the table and in an even better display. Flustered and blushing she tried using her arms to cover her breasts till Clara blanketed them with the coat.
You and the rest of the guy had averted your eyes and you told her "Sorry... didn't think that would happen... I'll pay for the shirt repairs..."
Gerald and Clara saw most of their guests were a little embarrassed after that event, one of them were petrified in embarrassment, and then the slutty looking girl was taking pictures. Thinking of a way to salvage the party they decided too...