"HELENA! DO YOU HAVE ANY IDEA WHAT YOU HAVE JUST DONE?!"
"Hihihihihi!"
"I know that you are still young in absolute terms, but that doesn't mean you can fool around and violate a taboo!"
"Hihihihihi!"
"I am being serious, Helena! If you won't take this seriously, then wait until I tell our mother!"
Bonk.
The older sister slapped her fist against her angry brother's head.
"Be cool, Ves. I was just honoring a tradition. There is no need to blow it up. It was just a kiss!"
"WE ARE SIBLINGS, HELENA!"
"So? That hasn't stopped the Gemini twins from smooching each other when they have grown old enough."
"I am pretty sure that you are underage!"
"I AM NOT!" Helena barked back! "I AM OLDER THAN YOU! Since you have already become a father, what is the harm of letting me enjoy a kiss?"