They said early on in this season that she lived in India for a year before deciding to move there permanently to be with TJ. Did people not see where she said that the things she chose for the apartment construction were not what she picked out before she left? Why is everyone saying she should have researched the culture? I’m pretty sure living there for a year can equal to doing some research on the internet.
It’s not a family secret - it’s something they do (probably did it on purpose to shock her).
Jenny also reacted badly when Sumit let a cow into the house. Who can list to her all the customs in the country - they are thousands. And this applies to every single country. There is no manual.