Chand and Bella I felt kind of same...
And Today Sulthan was so sure that instead of Madhu its RK who is gonna come.. Bcos he thinks.. RK's hatred for Sulthan is more than RK's love for Madhu...
But RK went there not bcos he hate Sulthan.. but bcos he don't want to see someone trying to seperate him from Madhu and thinking bad about his wife...
Sulthan wanted Madhu to witness RK shooting him.. so that she will feel angry for RK.. and will start to hate him... or feel disgusted as you said...
but looking at precap.. RK stopped the fight bcos of Madhu and kind of proved that for him Madhu is more important than his hatred for Sulthan...
I don't know i am just speculating.. I may be wrong also...