When Sally comes home from school in Mad Men 7.14, Person to Person, she finds Bobby in the kitchen scraping a piece of burnt toast while attempting to make dinner for himself and Gene. This ostensibly demonstrates the level of dysfunction in the Francis household after Betty’s grim diagnosis. However, fire has often been a symbol associated with Don Draper, who took a new identity after the real “Don Draper” burned to death in Korea. Certainly, Don’s secret past has contributed to many poor choices which have added to his children’s burden. Thus, Bobby struggling with the charred toast partly reflects that dynamic.
While the question of who gets custody of the children after Betty’s death is never explicitly resolved onscreen, Sally’s act of throwing out the burnt toast (along with the ending montage showing Sally taking on a “motherly” role), strongly suggests that Don will not be filling a primary parental role for the children in the future.
Sally has accepted the situation for what it is and intends to deal with it without Don.