Mood Swing, Anger, Depression (Not Sure)

From varanasi, Its for my brother's wife, she had lost her father earlier and 4 month ago recently her mother died due to covid. She is a mother of 2+ year old Son. And had gone thru abortion as family wanted to keep some difference between between children. She feel his husband didnt do much to save her mother and blame my brother and mother for abortion too. She gets angry on anything or any situation or sometimes just go mute or Sad without saying anything. And at last she says - missing her mother etc. she doesnt go along with others and has no close frnds. My bro try to keep calm but sometimes my brother lose his temper and shout Now we dont understand what to do and if we will try medical help she may take it wrong and feel we are thinking she is mad or something Please suggest can medication be done without her knowledge. Situation is not very severe yet but my bro is getting frustrated.