See in your case seeing available facts it is the job and condition because of that you are not leaving with each other no one amongst you have deserted other, or withdrawn from society of each other still you go delhi she resides with you.
So in a way in your case restitution is not maintainable you both just have a small issue that she does not want to come to calcutta with you so you cannot force her do so in a way in my opinion you have good terms among urself you can settle the dispute among yourself amicable with few adjustments it is not necessary here to go to.court for restitution as in case you go and may court order also then also she cannot be forced to go to calcutta.