I am at the end of my rope.  I feel like I am nothing but a nanny for my step child.  My SO and his child's mother have 50/50 custody.  One week on and one week off, as they live in the same school zone it works out that way.   On his week, he works a day shift and is home by time the child is out of school.  On her week, he works a night shift and isnt home until midnight.