Here is what I think is going to happen
Veer will soften a bit towards Rani because of her birthday. Rani will open up to him a little about her worries, but won't tell him the truth.
In the middle of the party, Ranisa will trick Rani again to make her leave the party by saying that she will hurt Ramu. But this time she will actually plan to hurt him at least a little by sending some goons or something. Rani of course will rush to the police station.
Ranisa will again be a drama queen and says Rani doesn't consider me her family, she left the party I organized for her, blah blah blah. But either Veer will be worried, or some one at the party like the lawyer, Vikram or Birju will get to know what is happening at the police station.
At the police station, the small fight that Ranisa planned for Ramu will lead to something bigger, may be due to Rani, which will cause both Rani and Ramu to get badly injured.
I still don't know if the accident truth will come out, or if Veer will know Ranisa's truth...ME will surely end at a cliffhanger