No this is properly .. career vs family .. ignore the spoiler in surrogacy ..
see it is properly shown Kaku wants Sai to focus on household .. she will make her queen bee .. full glory will be on her .. abd she also wants waaris
but Sai obviously wants to work as a doctor . Her husband., pata nahi Kyu . Cannot tell Kaku .. ( this is just to build suspense )
they have a strict doctor in hospital who will make Sai work very hard .. so she will have to balance both and face a tough time
Later on she may get pregnant.. then other issues will crop up .. or she may say I am too busy for a kid .. let’s outsource it to pakhi .. who is sitting free 😀.. that’s the most pragmatic option