Everything that happened in the show happens except everyone already knows rose is pink. (Sorry this story got away from me.  I can't think  of anything else for this story. I'm thinking maybe a new story or a rewrite) Lapis reunites with rose and her sister, the other diamonds are accepting of the triplets and the twins.
Triplets-Lapis,purple, and amethyst
Twins-Steven and Nora
The triplets meet their dad blue(BD is Male in my Au) (Yes I know lapis served blue in the show but in my au he didn't know that lapis was his daughter)