I guess Miland is acting that he is in love with prachi.because he wants Ayesha to feel more jealous & come back to Miland forever.(He is using prachi to get back Ayesha).
When Prachi get to know this truth ,she will leave the house & then the rest of truth's....hotel's & Sukrith's (25lakh) truth will come out...then Miland will fall in love with Prachi.
...........This is just my prediction.