She doesn't really change- her character just keeps falling lower n lower. First she was a darlin, so sweet, the ideal ma-in-law. Then we figure she's the one behind Gauri n Shiv seperating, and she got Gauri married to Shiv to remove some kundali dosh, but still some hope for the character. Then we discover that Ipshit is Shiv's girl, and this was done so Gauri dies n the two of them come together. And the final straw, in the end its all for property- she's come a long way from being one of the most loved character in the series to the most hated!