I may be totally wrong in this but I have a feeling that there may be another wedding of compulsion in store for us. This is what I think will happen.
Ayesha sensing that Prachi is hiding something and NP may not be actually engaged decides to ensure their wedding so that Prachi does not get Milsi.
She will again harp on the double wedding but Milsi may prevaricate, insisting that they need to wait for some time. In fact he will want to avoid marrying WWW knowing how he feels for Prachi though he may not actually say this aloud.
Ayesha may accept this but will try to ensure that atleast NP wedding goes through.
Mamaji will again be assigned the task of getting the family to agree to a hasty NP wedding and he goes about brainwashing everybody.
NP wedding will be arranged and Prachi will increasingly be unhappy. Neev is disturbed to see Prachi in this state. So he comes up with his own plan but does not discuss it with anybody.
On the day of the wedding he writes a letter stating that although he thought he loved Prachi, actually he just realised that he never really loved her. He was always in love with some other girl (maybe that Tina he mentioned yesterday) and had decided to elope with her.
Prachi is left on the mandap all decked up as a bride with no groom. Baba steps in and says that he cannot see the Shah family honour go down this way and requests Milsi to take the place of the groom.
Milsi hesitates first but then accepts for the sake of his father (and for his own sake because he loves Prachi).
So the wedding of 'compulsion' takes place.
Ofcourse WWW may create a scene. But Milsi may ignore her. If Neev is really smart he may even get WWW kidnapped on that day so that she is not around when all this happens. By the time she escapes, everything would be over.
After the wedding Milsi will try to 'win' his wife's love and we may get to see the awkward courtship between Michi, each thinking that the other does not love him/her but has been forced into this marriage but still trying to make the best out of the situation.
This scenario may play out if they do not want to end the PA track anytime soon and still give Jai his decent exit from the show.