We have seen Beth Twitty at her worst nearly nightly in the past 2 months. I think we can all safely say that she is one level-headed, intelligent woman. Therefore there was MORE than mother's intuition that A) She knew right away Natalee was kidnapped and B) she knew right away that Natalee had been in the VDS home. She's no psychic.
My guess is that once the chaperone call came in while Beth was driving back to Alabama, she talked to Jug and he checked their messages. So she may have already heard the message purported to be from Natalee while still on the road. Even if that message contained no Natalee voice but DID come from Aruba with the background noises and a voice saying "Are you calling home? Hang up that phone!" Beth would KNOW her daughter was being held against her will and she'd easily be convincing enough to get that state trooper who pulled her over for speeding to call the Feds the way it happened.
And remember, she must have listened to that call dozens of times, certainly 10 times with Charles Croes, before she went to the VDS house. And she instantly knew that Natalee had been in THAT house. Indeed, it was probably the monkey in the background.
Oh, my God, I hadn't heard all those details. Tears your heart out. What that woman went through and is still going through.