That's the key word in all your narrative. B1/B2 visas are NOT meant to live in the US. And CBP knows that. Just because the visa has a six month validity it does not mean she's entitled to stay the full six months. CBP does not own her anything, and any entrance until you're a resident is at their won discretion. So, whether you like it or not, don't push them because they will deny her entry next time, and that will result in a bar. Go to Ecuador or meet somewhere else until she gets the K1. Keep those encounters to a minimum.