You shouldn't shirk your parenting duties.
Sara is very tired after a long day of work but has to take care of her kids.
Sara wants to get some well deserved rest.
Sara orders some quality delivery from a healthy restaurant.
Sara just lets her kids eat whatever junk food is around the house for dinner.
Sara avoids having to prepare dinner and the kids love the food.
Sara's kids become quite unhealthy as this becomes a habit, and she feels like a bad mom.