I dont think she was aware its alcohol .. I m sure she never tasted anything like alcohol .. so for her it might b just a drink that Ranaji gave her
from precap it seems Rajmata might mistake Gayatri as the woman whose proposal she wanted for Ranaji .. so Rajmata thinks Gayatri is Royalty and might hv asked her to sit in some spl room and then might hv asked Ranaji to go and greet her ... Ranaji might hv assumed Rajmata wants him to meet this girl for marriage ..so he himself dint go but might hv sent this drink for her as a greeting gesture ... Gayatri mistook it as Ranaji sending spl drink for her , so she drinks it .. in short confusion hi confusion , but no solution 😆😆