Lorraine knew that she was very happy that she could finally resume to go back to her own home at least for sleeping. For the past few days she must have missed her husband and daughter.
Sarah is the type of person who is very rational when dealing with others but when it comes to her family she is very emotional. It can also be reflected on how she accepted her job as her assistant even though she was very capable.
If his father didn't disappear she would have been continuing on doing whatever she wanted. As her assistant Sarah would continue to do her job without being involved in the office which is the actual thing that they learned and graduated from. She would continue doing easier tasks with high pay but without much accomplishment in her job if she continued to work for her.