She always gives her the sargi and Madhu she never makes any for her, always last year during KC she was angry with Madhu and treated her like an outsider who wants to harm RK, this time again she did not make for her either but this time she is doing this because she feels Madhu does what she wants disregarding the family respect and honour. But Dipali who she prepares sargi for blackmailed her in the Sultan track with the image of Mohan and Meera (the marriage photo). Also she was caught inviting Sultan to the party which resulted in RK accusing Madhu of having an affair at that party and not be faithful to him, all of that is airing their dirty laundry in the public on the instigation of Dipali by inviting Sultan there. during the separation of Rishbala Radha even saw Dipali going in the room with RK and listened at the door and realised that Dipali wanted to have a relationship with RK she also heard and saw an argument between Sikki and Dipali about the same, that his wife was now wanting to be with RK and leave him, all this she kept quite but every KC it seems like a punishment to me to Dipali that she must maintain this ritual for the long life of her husband who Dipali would rather died then lived because it will free her from the relationship without her resorting to divorce and having to leave that house, so perhaps Radha really believes in KC a lot and wants the bad one Dipali to actually stay longer in this marriage with Sikki, live and kicking. 😛😆😳 So perhaps Radha is more devious then we all thought. She knows Madhu's love for RK and all her suffering she does for his wellbeing but Dipali only one time in the whole year can she do anything for Sikki and it's Karwa Chauth so Radha makes sure she does hold her vrat for him.