Just go slow because her actions could mean any number of things.
No expectations, no mind reading.
Text her something short or call and make it brief, "Hi, didn't have a chance to call back last night. Thanks so much for the package, we appreciate it" and then see where it goes.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss