You do not have to deal with another person's problems.
Beth asks Marry to help move things out of Beth's apartment, but Mary has just come down with a cold.
Marry wants to help Beth.
Marry asks her brother Marcus to help Beth.
Marry spends the afternoon unloading boxes and placing them into Beth's car.
Marry is able to recover from her illness quicker.
Marry's illness becomes worse forcing her to call into work sick.