That's just it - I feel like the creatives took out the "easy" route when wo ndering on how to get Sam out of Anu's life. They couldn't handle the more mature dilemma of having a loving supporting wife who wasn't the main lead, or even the protagonist's first love. So they though, you know what? Let's make her evil and complete the hattrick - that way we can get rid of her that much more easily. In my opinion, that was a cowardly move by the creatives, but not a surprising one, sadly.
Well said đekta's creatives are always nutsđĄ