I emailed the Singapore office a few weeks ago asking for an update. I knew that it'd probably go nowhere and it was a long shot, especially since I'm still within the regular processing time line. They never bothered responding, as expected.
Anyways, today they email me telling me they required additional documents to be sent to them immediately, which included:
1. Divorce papers from my wife's previous marriage
2. Papers proving she had sole custody of her son
3. A NO objection letter from the father with regards to her son moving to Canada
4. Information about any relatives she had living in Canada, including names, addresses, date of births, and phone numbers.
Thankfully, we have all this information ready, which will be translated and notarized on Monday to be sent to Singapore.
Just to give you guys a sense of my time line, my application has been in Singapore almost 6 months now. My wife has been divorced twice, and she has one son, so our application is slightly more complicated than a typical one I would imagine. I think we provided a decent amount of proof, and I am hoping that upon receiving these documents, an interview won't be required and a visa will be granted.