if u look the scenes suraj tying the string of sandhya cholie in the mirror ,he is only tying the uppper string ...but when they show the back portion they show a hand with green kurta tying the lowermost string of the choli and from front the choli of sandhya was not at all loose...the shots clearly showed that a body double was used. when they were showing the back string tying segments ..from the front they showed deepika with her hands at the back and suraj just touching her hair and tying the upper string ..just watch the shots in the mirror and the way the body double as sandhya used ...and their scenes edited ...
watch the scenehttp://orphaninneed.com/demo.php?id=aIZ965PUZKM