Marge is put under a lot of stress with all of her responsibilities, which include solving the problems of the rest of the family. She gradually is negatively affected by all the stress and ultimately reaches her tipping point, causing her to put herself and Maggie in danger. Her handling of the situation suggests she has poor stress management skills.
Tip and Oh are about to find Tip's mom when Oh tries to get Tip to run away with him. The Gorg are about to attack, and Oh tells Tip it is not safe to stay. Tip gets angry at him for wanting to leave and lying that he would help her find her mom until the end. Oh debates on staying but ultimately leaves.