Yeah but he dint really stopped sai from having food
He asked aai what’s going on
The way he ran outside after being told Ashwini was giving them food, it looked like was against it. If he didn't want to stop then he would have said to Kaku "So what let Aayi do whatever she wants."
Woh toh Ashwini started her rant about what a neech harkat he did and how she worked as a slave in the house that kept him quiet. Then later he asked her to get inside instead of feeding her bahu.
Sometimes words need not to be pronounced to see the meaning of the actions.