They could show that Simar is having a high fever and was very upset and didnt know what to do so she got sick and while she is having a high fever she starts to think that what could happen if she was to go and didnt return back in time.
But then she wakes up and even though she is having a high fever she goes to Prem and tells him about that dance show guy telling her what he will do and they together come out with a a plan. He tells her he stil wants to marry her.
So they then show the real wedding and everything happens like it suppose . With Simar being married to prem and not Roli.