Even supposing I am wrong about how old Dhruv was at the outset let's calculate using Thapki's age. She was 20 when she joined Dhruv's network( I remember Sania providing me with documented proof). Add a year for the events before sapola track = 21. After sapola 2 month leap, then Kosi 's track and at the time of Thapki's ousting she was 4 months pregnant so 21 and a half. Then 2 year leap = 23 and a half. Assuming Bihaan is a one shot specialist we can presume he knocked her up on their suhaag raat itself so add 9 months of pregnancy = 24 and a quarter. 7 years in exile and Thapki comes back 31 and a bit old. Add 15 years and Thapki is working on her 47th birthday. That makes her 10 years younger than Vasundara. Really CVs? I am even being generous with the times in which some events are meant to have occurred and Thapki could be even older than this.