I was watching old episodes on Hotstar and I think the actor who plays Khandelwal Seth appeared in Season 1. Remember when Bhabho takes Sandy to Maasa for first time? Sandy becomes enemy number one... Then Maasa's poti's doli is stopped. The groom's family spots a black mark on the bride. They say that it means she won't have sons. Sandy steps in. They shut her down. She then gets the groom's BIL to step in. BIL says I will also return your daughter (groom's sister). She has only given me girl child, etc. The Groom's family finally realizes their error when their own daughter's marriage is in jeopardy. BIL tells Maasa that Sandy instigated the solution drama. BIL was Khandelwal Uncle