My grandsons wife (16 years old) will not allow him to be by himself.  This even goes as far as going to the toilet, bathing, even leaving the room.  She is very violent, she has cut him on the face badly.  She is now pregnant, and I fear for the baby and my grandson, he has gone from a healthy 13stones down to about 6 stones with worry.  He is totally terrified of her, and he is scared to do anything about it for fear of reprisals to him and the rest of the family.    Please can you advise.
Hello She is showing violent aggressive behavior, and even she cut your grandson on face. She don't allow your grandson to be by yourself. She is constantly causing harm to him. Most likely these are the symptoms of some Psychiatric disorder. Main possibilities are some Psychotic disorder (acute psychosis or Schizophrenia) or Mood disorder (Manic disorder). In both of these disorders individual start showing violent behavior and may even cause harm to other or to self. I would advise you to take her to a Psychiatrist for proper evaluation and to differentiate between psychotic disorder or mood disorder. Sometimes pregnancy can also induce psychotic disorder. Medicines like low dose antipsychotics as Olanzapine, Risperidone can help to calm her without causing serious side effects to developing baby. These medicines are also available in liquid form and can be given by mixing with food also. But before starting a medicine consult a Psychiatrist and take proper prescription. Thanks, hope this helps you