I Know !!! Me too!! I was like , what else is new.
But, the funny thing was that as the name he actually expected her to not realize that he Has used her. So, it was a surprise and shock to him and so he had to scramble for a sec. to regroup and come back in force for further manipulations.
And Ofcourse, seeing the promo, Madhu will give in and take him back with open arms. I am thinking may be that is why Sultan is shown angry in the promo. May be he saw through RK's manipulations of Madhu and his lies to her and may be came to to tell some truth of RK's, only to see RK further manipulting her, or to see Madhu being completely fooled by RK.
What if RK now promises Madhu he won't hide anything from her and won't do anything to Sultan and his Mom but behind her back he went to Bhujang and Sultan found out about it?
And that's what Sultan came to tell Madhu?