(this occurred when I was three years old. my aunt and mom used to call me 'Umma')
they once went shopping and stopped to buy me a pair of chappals (kid-sized bear in mind).
Aunt (picking up a pair and telling my mom): Yeh Umma ke liye bilkul sahi hain
Shopkeeper overhearing and chiming in: jee han! ye aapke amma ke liye bilkul sahi hain.
aunt & mom:
translation
aunt (to my mom): these sandals would be perfect for Umma (me).
shopkeeper: oh yes, those sandals would be perfect for your Amma (mother).