Why do you say they are depressed then?
when you stay all the time in just one room and you sleep during the journey,it's not a good indication,it's just my opinion.
They spend most of their days out. When they come back at night they eat and go straight to the bedroom where they have sex, bath or shower and then go to sleep.
They do not spend their days in bed because they are not at home. I am not sure what they do and why don't watch the television in the living room, for example but it is their choice.