What are the possibilities of something like this happening :
1. Vicky marries Elena...
2. Once the infertility issues peaks, Elena suggests she can be surrogate mother...remember Sonakshi has no issues in conceiving but her womb is not hospitable enough to house it for 9 months... so comes in Elena...
All is good but this will be start of 2nd generation of life long ehsaan from cousins... will it be nature's way of teaching the ehsaan thing to Sonakshi...