Siblings of Corona B1:Life In the Tower

Now Being Posted on Ao3 too. What if Cassandra wasn't left behind and Gothal took her to the tower when she kidnapped Rapunzel. What if Gothal heard that a baby boy was born with moon powers and kidnaps him too and all three children grow up as siblings? This a Tangled story AU, where Cassandra, Rapunzel and Varian g...