this is what i would love to see happen.
i want yash to see how cruel his mother is to both aarti and ansh. i want him to feel even worse for aarti because he will see how much she has had to endure for this marriage. he will see his mother saying awful things about ansh, remember what he said to aarti about how she isn't arpita, see how paylak are instigating gy3 against aarti and ansh. he will realize that what the principle was saying is correct, how his daughters do not know how to interact with other kids. he will see a different side to his family and it will scare him.
if i was aarti, i would take my son and leave. society isn't everything. if anything, she can say she wants an annulment since they never consumated the marriage. and since it appears pari isn't a huge fan of the MIL, she may support her. let's see this family clear themselves of that embarrassment.