That part of the scenario is possible. Of course she COULD have waved good-bye to Kyron at 8:45 and stuck around looking at exhibits by herself (and maybe with Baby K) for another 15 minutes. BUT, it is the part about having left at 9:00 am (according to her own words in the email) from the school and driving to the FM store 7 miles away, parking, possibly unloading her baby, walking, shopping, and having a time-stamped receipt for 12 minutes later that defies reality.
my thoughts
ITA! Wonder what she told LE? Did she leave AT 9, or around 9? It is possible she left just after saying goodbye to Kyron at 8:45, drove to FM and walked into Starbucks in FM and got that receipt. Why would she say in her email after going over it with LE 5 times that she left at 9?