[Umavictor32]

See from my side I would suggest theta corruption kind transformation looks more sexier and adding value to the concept till now
But if u see to put brain wash and hypnosis will really make the story on towards lighter note and even  might miss the erotica involvement in the story 

So to put interest in readers Natural sex i mean no mind  control kind... Will keep the story alive and will boost readers sex 
Mind hypnosis and all will make it just an unreal stroy which is dead
Keeping the conversation and sex both is needed in the story 

Son should be kept away from the mother and let muthu also take her to international destinations in which vijay might also allowed to join and he is just kept in different room or mirror wall rooms so that he his made to watch how his wife actually behaves in bed with muthu
Focus more on the body parts of chitra more,use stuffs like strawberry chocolate syrup and other exotic stuff to make the episodes sexy during the sex episodes 
Don't make her a cheap whore who just get transformed and end up drinking and smoking with muthu
Let her be still slight conservative only even after so much of transformation
I feel the sex part in the story should be more clear intense  in illustrations rather running fast during sex activities it should be deep
 longer and more sensual

Let MLA also has his eye on her and takes her in his farmhouse alone and gives her the missed pleasure

This kind of transformation is needed 
Hope this might give u some idea
Thanks for writing wonderful updates 
Keep writing 
Happy Reading for readers

I am a female.. Dnt expect too much derailed sex from me... Anyway i will try