That's the stupid thing though, she's there, but there's no reason at all for her to be there. She had these other people doing her bidding, and if she was smart, she'd be waiting at the pickup spot with the kids, knowing full well they'd never make it. Then after "waiting a while," she could go home and claim she thought the plans had changed, and make a bunch of calls to Veronica's powered down phone for good measure.
This still would have all gone to hell, but it's just so mind boggling stupid that I can't get over it.