While I admit this case is extremely suspicious, and my hinky meter is definitely raised, I do wonder if it's possible she ran off the road. I hope they've checked any water nearby the gas station.
Because of Toni's car still being missing, I'm reminded of the Kristy Kelley case from a couple of years ago. There was a thread here for her. She had been out drinking with a friend and headed home late. Unfortunately, she never showed. She was missing, her car was missing, and, coincidentally, she had left her cell phone at her previous location. They searched for her for several weeks and I know some (especially others on SM) suspected her ex-husband. Come to find out, though, she had ran off the road and went into water. Very sad case! If I remember correctly, she had two kids, too. Her death was ruled accidental.
http://wishtv.com/2014/09/17/police-believe-body-of-missing-woman-found-in-lake/
Here's her thread if anyone's interested:
http://www.websleuths.com/forums/report.php?p=13081791
However, I think that's where the similarities end between these two cases. There's definitely some weird things at play here with Toni being missing!
Just thought I would add my two cents. I hope Toni is found soon...safe and sound!