She starts to wonder what I'm doing on the computer so late every night - am I working or am I chatting with someone else, or less paranoid - do I really need t

She starts to wonder what I'm doing on the computer so late every night - am I working or am I chatting with someone else, or less paranoid - do I really need to be up so late and is the computer or whatever work I'm doing more important than her? Am I working as productively during the day as I can so I don't need to always stay up so late at night? Also some of the best conversations happen late at night laying in bed. If you go to bed at different times, these never really have a chance to happen. And of course one of you is getting a decent night's sleep and the other isn't, so one of you is consistently more grumpy than the other. :)