@janani,
i think there is a big reason behind for hiding the killer part, i don't think it will come out anytime soon but it will one day as a turning point scene like the one at court. maybe director might use that to change charu or TA's mom (i really doubt that TA's mom will change even after that but Charu might).
coming to today's episode, as Theiva said i don't think director will turn Lav or her mom into good anytime soon. i feel like lav is going to get a big aapu from nithesh for her acts and i am sure this marriage wont happen that easily. there are a lot of things to include like how TA's mom ditched other alliance soon after nithesh's family came, till now noone knows except 5ppl. VR might play some trick using that to stop the marriage by acting toward TA to save him from the case.
for some reason i don't want Ishwarya to be thulasi's mom i don't know why lol. TA said he is going to office, does that mean they will show the inquiry this week.