https://www.instagram.com/p/B8qxbq4BWGR/
This was one of Sonalika's dialog in today's episode. Which i felt like, it was foreshadowing about the upcoming track. In the start of this Sonalika track, Prerna was both Anu's dulhan and patni at a time. Dulhan in the eyes of society and Patni in Anu's heart. Hence, it looks like as this track comes to a closure, Prerna, the dulhan, will have her bidaai from SN only to retain her position of Anu's wife in BB.