Well...I dont know why but Im sure ShivOmRu is legitimate kids. No one from them is najaayaz.
"Oberoi sahab ka bada beta najayaz hai" - I have strong feeling it is Tej.
During IV Sushmita ji (Choti Dadi) said her character have painful part..Thats why she will be grey but not so negative.
What I think...I think Tej Choti Dadis son. Probaly Dada ji took child from her or something like this. Thats why she have painful past. But so many days I have feeling Tej is Dada ji ka and Choti Dadi s najayaz beta.
Just thoughtsđ