One more possibility. Pallavi confronts Raghav about his illegal business activities. He remains adamant and even states that he has her because of his money. Pallavi warns him that if he doesn't stop he would lose everything. The ACP exposes Raghav's custom duty escape and Raghav loses a significant portion of his wealth and business (because of penalty etc.). Raghav is not able to digest this defeat and hence loses his mental stability. Pallavi is in the RR mansion with Raghav but is forced to take up low-level jobs because of their weakened financial situation and Raghav's inability to do business. In the promo Raghav was aggressively shouting Pallavi, that could be because 1. he is angry with her because ACP used her (indirectly) to expose Raghav's misdeeds, OR 2. he is longing for Pallavi because their relationship is destroyed after the revelation.
So we could see how Pallavi supports Raghav in this situation, how RaghVi resolves their differences, and how they both get back things they lost (money, business, relations, etc.).