Agree with you, its not Ansh but Arati to be blamed. This is not the first time Ansh is being outspoken to Gayatri or others, I am not telling her to beat him in front of others but she can make him understand the situation afterwards which she never does. By seeing her behaviour it feels like Gayatri's idea of not bringing Ansh along with them was right. Arati is still always behind him and not taking any initiative to get familiarized with the new environment or to become close to Payal and Palak. Also she was roaming the whole house after Gayatri's saying about Tulsi pooja. It might have felt like an insult for Gayatri when she very coolly disobeyed her that to in front of others.