I am a habitually early person. So much so I have to be at least 15 minutes early to consider myself on time. If someone says to show up at a certain time I'm there early. I've even gotten to the point of telling people if you want me to be on time tell me to be there 30 minutes later. So if its at 2 tell me 2:30. Granted it takes a lot for me to accept being late for anything but I completely understand her request. Maybe she wants to see how much anxiety it may cause you and work you through the process of letting go of that compulsion.