Mental harassment at workplace with my wife

Respected Sir / Ma’am, After tried all possible scopes, I am here to discuss my problem with you all. My wife who works in a MNC Company from the last 7 years in Chandigarh. So far everything was going good moreover she joined as a validator then team lead then Senior Technical Consultant (under different mangers) Since she was pregnant and was on leaves and her management got changed. After her delivery she joined after 5 months under the new management. In starting her responsibilities was changed. She takes it casually. Then her leading role was also taken back without a reason and handover her responsibilities to her team mate who is not able to write a mail himself and junior to her. she fights for this change as this change was done without a reason (cried in front of her manger as well why they are doing all these changes without a reason) but with the help of Project director her manger wins. And then her manager and director start creating problems for her and had started torturing her mentally. Due to that her professional and personal both life’s got disturbed. I suggested her to leave the company but she said I have given my precious 7 years to this company and achieved this position myself.so why she left the company. Management also tried to find out mistakes from her work but not able to. After that they start raising un necessary issues like exceeding of breaks and give her a warning from HR team that she is spreading negative things in team. She approached the HR team as well but no use. After all this she is very tensed and not able to sleep well, moreover not able to spend time with her baby. Every time she is tensed about her job. Dear sir and madam, I beg your good self to kindly advice the appropriate action / step that I can suggest my wife to take against management behavior. looking forward for a favorable reply. she is under tremendous pressure. I pray to god she doesn’t take any wrong step. please help me out as 3 people life’s are disturbed…. me, my son and my wife.........