They were heartbroken
Because she had informed Thom that she had a remote job, Emily was able to spend so much time with John and Caroline. She had previously told John the same thing, but they now know that she genuinely visited the other family each time she had a business trip. They were genuinely brokenhearted.
The truth had come out
Clara had acquired a lot of friends and didn’t want to move, despite Emily’s fervent attempts to transfer her once more. Since her girls went to the same school, Emily knew in her heart that the truth would ultimately surface. Fortunately, it did. There was no avoiding it any longer.