WTF Moment - Who's That Sleeping in the Bed 2?

I came home from work last night and as I walked into the house, I almost tripped over a child's car seat.  I did not recognize it as one of the ones we use.  I shook it off and walked to the bedroom to gather clothes for the next work day.  I walked into the room and was greeted to the site of my wife, my youngest and the nephew's one year old all in the bed asleep.  WTF?  The nephew has a room in our house that we have graciously let him occupy for damn near a year.  Why is it necessary for his child to sleep in a different room?      Sometimes all you can do is accept a situation and shake your head.