Why does Aunt spiker stop Aunt Sponge from eating the Peach?

Aunt Spiker stops Aunt Sponge from eating the peach because she wants to keep it for themselves, as it is a rare and magical fruit. Additionally, Aunt Spiker is more focused on the potential profit and benefits they can gain from the peach, reflecting their greedy and selfish nature. This moment underscores their exploitative relationship with the peach and foreshadows the adventures that will follow.