is nitya relly murderer?

i m confused 😕 if nitya is the murderer..coz the day wen tht guy..i mean son of nirmala whatever his name is burnt the letta he said..tht itna din woh is ghar mein rehrahahai aur phir bhi woh careless tha..i think thtz wot he said..it means it is not a lady but a guy..i doubt shaurya but i don want shaurya to b the killa😭