Hi guys. For the past day I have been wondering and wondering what had happened that ashu would sit and watch mallu being taken away to the asylum. I always pictured him being the one to get rid of her(not physically) after he discovers the truth.
Maybe this is the answer to the question that's been nagging me. So DB leaves because ashu looses his temper and says things, he shouldn't, and nidhi defends him. On top of that she also ( I guess) overlooks (for the time being) his statement regarding DB taking nidhi with her and leaving.
Now we know that nidhi does not tolerate anyone hurting or talking rudely with her family, so seeing dadibhua leave like that(basically leaving her house after being insulted by her husband), nidhi finally let's loose and delivers some home truths to Ashu, regarding his sick sick behavior. Then probably a big fight between ashni, which threatens to get out of control. At which point BB finally decides to take control and act as mediator. He probably suggests to ashu that he should not destroy his married life, so better to send malignant mallu to a care facility.
After this, even though nidhi stops Mallika, tension track between ashni starts. This will probably go on for another 2-3 weeks, during which Mallika will start being her true self, and pretending to recover, maybe also finding Rohan's letter and making sure ashu also finds it, and of course using every opportunity she can to try coming between them. Then the MU track starts, another 2-3weeks, then when nidhi gets fed up separation track, during which mallu will trip up and get exposed, then reconciliation and pregnancy track, then mallu darr track and nidhi MC track, ashu regret track, Rohan track, ashu jealousy track etc etc.
Then after all these mature tracks, maybe KP will tire himself out. Hopefully, after this, maybe just maybe, he will give us our track, the one we all have been waiting for, Ashni Track.