She does not appear to be Seethe/Sita!
What educated?
Nobody will call this behaviour acceptable.
Your mistake was asking wife to join with you at your parents house.
since 3 years she was free bird, not under any kind of obligation, now she is put in a den, by you.
In den already one lioness is there, which is your mother, she ie your wife is another lioness, two lioness cannot live in one den. Its as simple as that.
IT would be wise of you to go for separate accommodation along with wife and kid alone, or ask her to go and stay back with her parentage and you keep visiting them as and when you can. Like that you need not file divorce case, she will not file false criminal cases like dowry, DV etc, you will also not have to pay alimony to wife and kid.
You jump the gun and lose patience, you and your parents will have a tough time for the rest of your lives. This no lawyer will tell you.
My advice to you is, dont jump the gun. Take wife to separate bone [cage], two lioness cannot live together, ie separate house. You asking kid to be with you, its not toffee that you keep in your pocket. Once you go legal, you will have to wait for kid to turn 7 so that court will ask kid whom it wants to go with, till then it will be with mother, at the most you can get child visitation rights.
If you doubt that wife might commit suicide, its better to go to your area police station and give a complaint about this without fail, if for joke sake or just for threatening you all if wife does something stupid, you will all go to jail, so prevention is better than cure, go give complaint to CI that your wife is always threatening to commit suicide. I would also suggest to send a lawyers notice to that effect, asking her to mend her ways and not do anything stupid and continue leading happy marital life with you, even though she is at the moment living with you. Do like this if you want to save you and your parents from falling into never ending legal trouble. In PS, the will give NC number, make a note of it, also apply for certified copy of complaint, which will be very useful in the future. Make use of spy camera to record activities/conversations of wife.
If you cannot stand the sight of your wife, and want divorce ultimately, go for MCD, pay her hefty one shot alimony, forget the kid and be happy, you be free man in 6 months time. If wife wishes to contest divorce, it get over in 7-8 years time. Along with that complimentary gifts of NBW via 498a, DV, 125 crpc are there, those cases also take 10 years to get over. You will grow old in court, your kid will grow in court. Dont worry, you can also sue your wife in such a case, and she will have to do time in jail, a good 7 years if its proven that she lied under oath via those false dowry case, DV, maintenance cases and also pay fine. \
Again, it was a idiotic step to move into parents house after living separately for over 3 years. Moresoever it was a big mistake you got married, these days live-in relationship is the trend, live together until you get fed up of each other and move on. In that you got married, and also had se x with wife without condom, due to your idiocy, not only you will suffer, your parents will suffer, her parents will suffer, and also the kid will suffer. Anyhow, choose what you want to do very carefully, the decision you take now will decide what your respective futures will be. All the best.
