I Became The Youngest Sister-in-law Of The Male Leads In A Tragic Reverse Harem

I was reincarnated into a hopeless, despair-filled reverse harem novel, but strange enough, the female lead died.I was still processing the shock of the original plot being completely wrecked, my older sisters started getting involved with the male leads.The mischievous and obsessive emperor ended up with my mature, gentle eldest sister.The aloof, world's strongest swordsman fell for my second sister, a romance genius.And the flirtatious genius Tower Master paired with my cynical youngest sister. And me? I'm only six years old, if I get involved in a love line, I'll be thrown in jail! Anyway, my sisters seemed to match well with the male leads and even got married. But then..."Liliana, try calling me big brother.'""Out of all your brothers-in-law, I'm your favorite, right?""It's the emperor's decree. The youngest sister-in-law will live in the imperial palace. She'll be treated like a princess."I just want to go back to the time when it was the four of us sisters living peacefully together!