They showed Kunal and mauli happy and romantic in the beginning.
Suddenly Kunal falls in lust and then in love with the next available woman.
This makes me think that maybe the marriage was weak in the first place.
It would have broken no matter what.
The cvs should have shown us cracks in the marriage before he fell in love with nandini. But mauli is projected as kunal's ideal wife.
Kunal says that it is friendship wala love, but in real life that love only survives.
The same writer had written ballika Vadhu, it was shown very well the reason why jagya went away emotionally from Anandi.
The marriage which was so weak that Kunal fell in love so easily was very fragile indeed .