It's very strange the CV's have chosen not to show Deepali question Sikki at least about the locker, perhaps she had it in mind to say Madhu stole from her the night she gave her the saree to wear for the puja, but because RK made madhu change she didn't go through with her plan. But still by now she should be rankled enough to raise the alarm or even question Sikki as he was acting strangely that day. It seems she doesn't even care about the money or jewellery. She must know who took it, her husband.
Him also knows that she is fascinated with RK's business, because he was buttering her up with information about RK and Madhu on a scene they had together in their bedroom telling her that Rishbala's relationship is not amicable that they were pretending the night at the studio was for them to get close, when he was showing her the newspaper, then she realised she had a shot at trying to break Rishbala, because she knew from that conversation that they was no love and also confirmation from Radhaji in the kitchen later that madhu was brought to be bahu after her father needed 40 lakhs for his treatment. So back to Sikki he was telling her that information in the bedroom why? His a childish character perhaps he knows deep down she loves RK still and doesn't give him any time, but his happy enough to live off the crumbs of her affection, if he feeds her information about RK she can smile at him a few times and be nice to him...poor him 😆