The precap proves that Vyom is possesed.

So shiv has possessed Vyom or messed up with his head so badly that at first he molested sharanya and now he threw sharanya inside the water tank and left her to die.

So good to see Shanny trust Vyom enough to think thrice about his behavior. Loving VAnya's relation development, they trust each other enough to keep their relationship healthy in this unhealthy atmosphere.

It is so obvious that Vyom was possessed when he molested Sharanya and in the precap. Remember how the EDT music played in the background when Vyom was giving those looks to Shanny, so far that background has been played only on Shiv so yeah it was def Shiv who used Vyom's body to molest Sharanya.

And I am proud of Shanny for actually trying to figure out why Vyom did that. She just trusts him so much that she's refusing to believe he can do something like, itna jaldi itna trust kissi par nahi hota unless you have some past heart to heart connection 😳