Kate calls her sister Lisa, who drives over right away.
"So what did you want to show me, Kate?"
"I have a machine that can turn people into breasts, and I'd like to use it to turn my boyfriend and I into bigger breasts for you."
"Wow, really? Let me see!"
You and Kate both hold the gun and aim it at Lisa's flat chest. You pull the trigger, and there's a flash of light. You feel the familiar sensation of being a breast, only you can also sense Kate next to you. Above you, you can hear Lisa talking.
"Wow, these new breasts are huge! They must be..."