So my matron head canons for living conditions have always been thus:

• Sitting room is situated just off the common room and also has it's own exit to the corridor beyond. So if someone came to the matron with a problem there is a discreet way to visit them, rather than doing it in front of 50 other people.
  
• Connie has a portrait of Anne Stanhope guarding her corridor-entrance. Other hilariously awful historical figures that it personally would amuse me to discover were witches are available and ngl I have ideas for the other houses portraits but don't want to push in!
  
• Bedroom is connected to the sitting room so there's no reason for any student to go near it. The matrons rooms are all positioned on whatever side of the common room the girl's dormitories are so if the girls need them in the night they are slightly closer.
  
• Matrons are available to female students until lights out officially - because no headmaster has ever wanted to acknowledge why girls might need them in the middle of the night - but unofficially all the female students know they can always knock.
  
• Matrons are available to male students during school hours but their role as it pertains to the boys is either disciplinary if they see some transgression or offering basic grade academic direction. Less of a supervisor, more like a friendly, dignified auntie that is to be treated with respect but is largely ignored.
  

I'm still trying to decide how I feel about a parlour :P