You have a good point, but IMO, someone covering something up or trying to make it look like she took off voluntarily, may have thought the text would actually keep Amber from being worried. Where if she was a no show at the airport Amber would freak out. Someone who knew enough about the relationship to know that Katelin would text Amber if plans changed, but not know enough about the relationship to realize that Amber would do the opposite and call Katelin's Mom. JMO, but not everyone is going to freak out about the wording of the text. If my husband had sent me a text like that, I definitely would be texting or calling him to find out why, but I would think that he wasn't replying or it was going straight to voice mail because either his phone died or he had no signal. I would wait a bit and try again. If I still received no answer, then I would be contacting whoever he had been with to find out if they knew what was going on. And honestly, if they said that they received a text that he was on the flight, I would just think that whatever happened was fixed and that he was on his way home. It wouldn't be until he was a no show that I would know that something went wrong.