"How about we go for a swim, [your name]?" she asks.
"That sounds nice," you say.
The two of you walk towards the shore. You dip your toe into the water, and flinch when you feel how cold it is.
"What's the matter?" Luna asks, knowing full well what the answer was.
"Nothing," you say. "The water's just a little cold, is all."
"Oh, don't be such a chicken," she says.
"I am not a chicken!" you say defensively.
"Oh really?" she asks. "If that's the case, then you won't mind if I do this."
"Do what?" you ask. You get your answer when Luna's horn begins to glow, and a blue aura surrounds you, lifting you into the air. You realize what Luna's about to do, and you repeatedly beg her to stop, but your cries fall on deaf ears. Luna lifts you higher and higher, then moves you over an open area of water. With a snap of her fingers, the spell releases, and you fall straight into the cold water. Even under the water, you can hear everypony laugh at you. You resurface seconds later, gasping for air and shivering. You turn around to see Luna was right behind you.
"That was... n-n-not cool... L-L-Luna..." you say.
"Oh, don't be such a drama queen," she says. "The water's not that cold. Besides, even if it is, you'll get used to it."
Since you were rather infatuated with Luna, and she looked kinda hot in her bathing suit right now, you decided to just let it go. The two of you play with the other ponies in the water, and you and Luna chat with each other for awhile. While you were talking to her, you feel the water behind you shift, as if somepony was swimming behind you, but when you turn around, nopony is there.
"What's the matter now?" Luna asks.
"Nothing," you say. "I just thought that somepony was behind me."
"It must be all in your head," she says.
All of a sudden, the water behind you rises as somepony emerges from underneath, grabbing you from behind.
"Got you!" the pony says. You recognize the voice.
"Celestia!?" you say. "What the hell! Let me go!"
"Uh, uh, uh," she says. "You know you're supposed to call me 'Auntie Celeste,' [your name]." She hugs you tighter, and you blush when you feel her ample chest press against your bare back.
"Seriously, big sis, let him go," says Luna.
"No," the elder princess says, sticking out her tongue.''
Luna thinks of a way to get Celestia off of you, and what does she do?