Starting from precap, Raman now knows something is fishy with lawyer lady. If he stays in his character it won't be too long for him to connect the dots once he gets to know about Subbu and his Ad company.
Subbu will fool Ishita with his sweet talks to get custody of Ruhi and she will be blinded by her love for her daughter, in the process she will put her marriage on risk. I guess Subbu jhap by Ishita on its way and Raman will further move away from her emotionally.
Since KP will be unavailable for some time, it's unclear how they will proceed this track.
For the time being, I'm happy that Subbu is not a so called "positive" character. 😆