>"Apbbbbbttttttt!"
>The sun pony's younger sister couldn't help but roll on the ground in laughter.
>"D-do it again, Tia!" Luna cried through giggles and snorts.
>Celestia smiled fondly at her younger sister, then once again set her hooves on her cheeks, made her eyes googly, and blew raspberries.
>"Apbbbbbtttttt!"
>Again, the little blue filly can't help but laugh as her older sister makes the silly face.
>"A-again!"
>A sly grin crept on Celestia's face.
>"I'll do you one better, Lulu."
>The white alicorn approached her sister menacingly, the blue filly slowly realizing what was going on.
>"No, don't do it Tia!"
>But it was far too late for the young pony to run. Her older sister had already place her muzzle on her tummy. Certain doom was at hoof.
>"Pbbbbbttttttt!"
>The blue alicorn squealed and writhed, laughing as her sister blew raspberries on her tummy.
>The relentless assault left Luna's belly feeling nearly numb in the aftermath.
>Celestia lifted her head, smirking at her younger sister.
>"You want me to do that again, Lulu?"
>The filly got up on her hooves, then shot a determined glare at her sister.
>Suddenly, the bravado Celestia had previously shown disappeared in an instant.
>"L-Luna, what are you doing?"
>The blue filly reared a bit, like a predator about to pounce on its prey.
>"Don't do i-!"
>Celestia's plea was cut off by a blue blur jumping onto her, setting its lips on her belly and taking a deep breath.
>"Pbbbbttttttt!"
>"No-ho-ho-hooooo!" came Celestia's cry of surrender amidst laughter and tears.
>Luna rubbed her face back and forth on her sister's belly, increasing the potential of her ticklish lips.
>Celestia's hooves wiggled as she squirmed on the ground, laughing while her sister continued her attack.
>When the little filly got tired, she hopped off the older sister's stomach and stood victoriously.
>"I knew I could get you back, Tia!"
>But suddenly, Celestia got up and gave Luna a toothy grin.
>"I'm going to run back home, Lulu. If I beat you there, I'm unleashing the tickle monster."
>She unfolded her wings and pointed at her feathers to emphasize the danger posed to the little moon pony.
>"You wouldn't dare."
>"I would."
>Without hesitation, Luna bolted from the grassy hill to the village below, leaving her older sister in her wake.
>Celestia laughed and chased after Luna, confident that she'd make it home first.