English is OK but sounds awkward, does not flow smoothly.
Pak Robert, maybe because it's in passive form, I understand from other comments that it's not very common in English to use passive form.
shouldn't it be "is being asked"?
Why is this translated as : My younger brother is asked for money by them.
I would translate it as : younger sibling = adik,
younger brother = adik laki-2, younger sister = adik perempuan.