After Rebirth, I Became the Beast Concubine of the Dragon Clan Crown Prince

Our Qingqiu White Fox is the appointed beast concubine of the Dragon Clan. When we reach adulthood, the elders teach us the secrets of the clan. My elder sister chose the method of easy pregnancy and married the prince of the dragon clan. As long as she gave birth to a dragon son, the mother would be more valuable than the son. But on the wedding day, the prince unfortunately died in the battle between gods and demons, and his sister became a widow before her wedding. However, I have developed a peerless skill and helped my black dragon husband successfully transform into a dragon and ascend to the throne. My sister was so jealous that she took advantage of me to practice in seclusion and pierced me with a sword and took away my inner elixir. When I opened my eyes again, I went back to the day when I was taught the secret technique. When I saw my sister decisively choosing the technique and voluntarily marrying the black dragon, I knew that she had also been reborn. She thought she would definitely become the queen of the dragon clan in this life. But she didn't know that the so-called secret technique could not change fate against the will of heaven.