these are my assumptions only based on todays episode.
1]
vidiths past--why i feeling vidith has connection with underworld and which may prove fatal for him.??
2]
future inshi separation reason may be shown in todays episode.
and that is rishis new aadat--gussa.
rishi kahan se seekha yeh gussa main indira ko chod ke jane ka aadat.??
today even indira wondering about it.
this is 2nd time--1st time he left her and gone in anger --when she said no to marriage.
so cvs started to create base for rishi leaving indira and SN in near future.
so --we may expect rishi leaving indira and SN in anger in future episodes.