Remember also that Heather may have been communicating with SM (or someone she thought was SM) in other ways in between those phone calls. LE spoke about private messaging--that may be limited to the November texts presented yesterday or there may be more from the morning of the 18th in between those phone calls.
Now that we know that SM was not in charge of his social media, I have to wonder if Heather knew she wasn't speaking to SM in those PM. It will be interesting to see what those PM's said.
Kelly