So there's been a little discussion about Amy and Grace being the same age and George possibly being Grace's father. I was thinking at the very beginning of season 1 Grace said she was almost 16. School had just started so it was September. Then it's June the end of the school year and she is still 15 as well as Amy. (Turning 16 is a big event in most teens lives so I doubt that they would just have skipped over her 16th birthday if it had of occurred already) In a preview for a future episode Amy or someone says to Amy ( I forget which one it is) she's almost 16 (which is the same year I believe because I think John is still a baby not a toddler). By now Grace should have turned 16 otherwise the dates don't add up. We all know George and Kathleen used to be married and now George is married to Anne and Kathleen is married to Marshall. How can Amy and Grace be the same age if Marshall and Kathleen told Grace that they waited to have sex (remember the episode when Grace called her parents a hypocrite because she didn't think they waited)??? If they are the same age then why hasn't Grace grown up a year yet??? Also if they are the same age it adds support to my theory that Grace could possibly be adopted as well or it helps support other people's theory that George could possibly be Grace's father. By the way I doubt that Grace had just had a birthday when school started because they made it seem like her birthday was coming up not like it had just past.