I find the little-brother story almost entirely unbelievable, but someone trustworthy could try skyping Alia, get both her and her brother on video at the same time, and interview them about this matter to check that they're not just actors.
Btw, another user from "singapore" has pitched to sell loads of ether / bitcoin to Indians through hawala methods
here. Just like Alia did
here. Kindly check the ip of this guy and cross-reference it with Alia's and her supposed brother.
No match. Singapore is famous for its economic freedom, so it may actually be a legit method.