I think you could be right, and I do wish that it is. But then, Neelam is based in Kota, which is way off from Udaipur, whereas Brij was cheating w/ a girl if not in town, at least in the vicinity. Maybe it didn't end, and Neelam didn't openly break up w/ Brij, but their fortunes took them apart. Did you mean to say Sushma when you said Jyoti i.e. when Sushma was being evicted from her house on Dusherra, then Brij was shown in a girlfriend's house, and shut off his phone. Could Neelam have been her?
I hope it is, and I hope it comes to light to the Vashisths after the marriage. They won't be able to throw her out like they did Jyoti out of fear of any repercussions Minal might suffer, so it would be funny to see them have to suck it up. I would feel somewhat sorry for MN&G were that to happen.