Overnights can be great , but it's really important to confirm with the girl before how much sex you expect , what kind of time you might sleep , and that you want to fuck in the morning before she goes (assuming you do ).
If you know the girl already , then ok , but if you don't , be explicit about what you want . That way , Everyone will be happy in the end .
Amy is great fun , and loves sex , but get the details straight before it happens .