Thanks for the effort, unfortunately thats not full headers. Full headers include microsoft email code. Dates basically don't mean a thing.
Also, just some advice, if that's your real name, which I doubt, don't ever post your real name to a stock chat aboard. It's not worth the grief.
Have you ascertained that Sara is much more than a employee or business partner?
Because she is. And she's deep into this up to her bra straps.