ughh you are SO RIGHT! I absolutely hate bua. She doesn't even deserve to be called a woman. She's just bitter because she couldn't find happiness again after her husband died so she feels no other woman should get that right either. Remember when she was talking to Gayatri? She was saying that every woman has desires and needs that remain unfulfilled after a husband's death and look at Aarti - how she gets all that back..etc etc.
btw gayatri is not AS bad as other saas's on television. She's worried about her son, and some of her points are valid to a certain extent. Especially when she tells aarti to make an effort to get more closer to yash and yash's daughters, and to let Ansh go so he can get used to the family. Sometimes she IS absurd like when she locked him up, but other times some of the things she states are pretty accurate.