Natalee's Family's Agony

(CBS)  More than two weeks after Alabama honors student Natalee Holloway disappeared in Aruba, her family members there to help in the search are "in agony," her stepmother says.

And Holloway's aunt says each day seems like "Groundhog Day," the movie in which each day was the same as the next, as the 18-year-old's fate remains a mystery.

Natalee's stepmother, Robin Holloway,

told

The Early Show co-anchor Julie Chen Friday the ordeal, now in its 19th day, "has taken its toll. Every day, we still get out there, we look and we're still looking for Natalee. But, it's emotionally draining, and it's physically draining. Every day, just we wake up (and wonder), 'Is today going to be the day? Please let us find Natalee.' I mean, she's here somewhere. (We take it) one day at a time."

Linda Allison, Natalee's aunt, told Chen, "We refer to this now as our 'Groundhog Day.' Except Bill Murray's not starring in it. We just never expected that every day we would get up and we still don't have any kind of news or any evidence where Natalee is. So we just continue to get up every day and get out and do our search and look for possibilities."

Though a fourth suspect has been detained, Robin told Chen she's convinced the three being held already know what happened to Natalee: "I don't think they're going to find Natalee until these three guys talk. They know they were the last ones to see her. And I firmly believe in my heart they know where Natalee is; just, please, tell us. They hold the answer."

What would she say to them if she got the chance?

"What did you do with Natalee? I mean, we're in agony. Just please give us Natalee. Wherever she is. Just why are you doing this? You're breaking our hearts. Just tell us where Natalee is. This has gone on way too long."

Allison says, "They can surely understand our heart pains, the heartache that we have. I want my niece back. Our family wants Natalee back. And I don't know if they have plea bargaining here, but we just want to be able to get to some kind of resolution. We want some answers. We want them to tell the truth."