I have been thinking about this for sometime and generally in serials there is always 1,2 characters in the sasural who will make her life hell. Initially I thought that character was going to be priya but as the days are passing I have a feeling ki it's going to be satyawati who will have a problem.
I have a couple of reasons for thinking this
1) she never says the problematic things in front of dev which is why most of us are unclear about how much dev knows about what happens in the house.
2) it is weird why dev being the person who is incharge of the office doesn't even consider himself the real head and thinks his brother deserves that chair when his brother hasn't really been shown having any interest. Kahi aisa toh nh ki satyawati wants only her son to inherit the property, that would explain why she wants dev to settle with amba or somebody older. I am sure she will have a problem with vidhi and dev not because of the age gap but perhaps because dev could have a higher chance of having a family which will inturn make his son not the sole heir to their property.
3) we hear how dev has been working since he was 15 and he was the head of the family from such a young age. As far as I assume nahi saryawati uneducated hai na hi dev ki family itni poor thi ki apne 15 saal ke baccho ko business takeover krna para. Satyawati could have been the adult to take care of the family instead of making dev take all their load at such a young age.
4) satyawati is way too nice to dev and is always talking about how much dev did for them and stuff. I am yet to see her doing something worthwhile.
As I said vidhi won't just be the storm that might start dev's love life, she will also be the storm that will force her to see the real nature of his family and he might start to think of himself for a change.