My take has been that she was in the habit of occasionally taking off for a couple of days to spend time with <ahem> someone other than her husband. The Michigan Man and the new dude from SOCAL line up with this, as does KP immediately using the "find my phone" app, rather than calling her, texting her, calling friends and family, etc.
KP was fed up, reported her missing, and blew up the news. The whole "super mom," "our girl," and "signature hair" was OTT and ridiculous, and perhaps could be read as snide or sarcastic.
And ultimately, he knew she wouldn't miss Thanksgiving with her family.
She was embarrassed and humiliated, did (or had done) just enough damage to herself to somewhat support a kidnapping story, but not so much as to have to be kept in the hospital for any length of time. And refused a rape kit.
And now she has learned her lesson, and stays home with Keith, happily ever after.
I think the $50k go gimme money was an unexpected plus.