I think I found the answer, and it's simple!
She dressed like a married woman so people wouldn't taunt her for being a mother out of wedlock, and Akash for being "illegitimate". She wears it so people will believe that she is a married woman, and her son has a father. That is the most obvious reason, and I have no idea how I missed it before.
I may be wrong, I'm just speculating. Let's see if the CVs address this in the show. If they don't, then I'm going to stick with this theory, unless you can think of another one. So what do you think? Do you have another theory?