You both then see a bolt of energy come out of Lust's hand, as she zapped your girlfriend with one blast, which caught the attention of everyone at the convention you were at, and confirming that she wasn't really a cosplayer. After getting zapped by Lust, your girlfriend started to feel strange after that.
First, your girlfriend saw a huge lump growing in between her legs, which expanded, and then broke out of her pants becoming a huge shemale penis, but without testicles to way it down. Not only that, but your girlfriend also found that her breasts were increasing, and 3 extra cup sizes, while her butt expanded to the same level to match how the breasts were elevated. Your girlfriends clothes break off of her, leaving her embarrassed, while naked in the middle of the entire convention.