They just played the episode where Vasu calls Krish on Mamta's phone, to bring him to the reality of Mamta's death.
Now, if she called Krish from Mamta's handphone (it showed Mom on his caller display), how on earth did Mishti bua find the phone in Tanisha's bag??? 😕
Also, didn't Mamta used to have a sister who at one time, claimed to be carrying Karan's child. Could Vasu be Mamta's sister, why else would she be so close to Krish? Just a thought!