Totally agreed on this. Speculating, the "up too" might be (from what I can see online) better be
in on it, as
@Ghostwheel noted, ready for it-- whatever the "it" might be. She then gets a better idea of what the "it" is, can't believe he's calling her at work about this s---, so she is not pleased with the "it," and the "it" has come out of left field. She is now at her workplace, where she doesn't want "it" discussed (jmo likely understandable), Goes outside.
100% agreed the "kidnap me again" is likely flippant and sarcastic, and (speculating) he probably was becoming increasingly enraged but cloaked it enough where he'd get his chance to act. When she didn't bring "it," wasn't interested in "it," he turned on her in the isolated space between them he'd created. The space was likely created by brandishing a weapon (or threatening to do so at too close a range for her to turn back), and it was a gun.
There's something up with the new phone & "Kel," agreed, and there's all the talk of accomplices in MSM. My understanding is there are more texts than those we've seen (anyone know, is that correct?), and once we get all the texts, am hoping we'll be in a position to better know what happened. It's mortifying.