In May, ‘Sesame Street’ introduced a storyline involving Karli, a 6-year-old green Muppet with yellow pig-tails, who happens to be the show’s first character living in foster care.

So now, the online series ‘Sesame Street in Communities’ is explaining why Karli’s mom had to go away: She’s in treatment for drug addiction.

In their description on YouTube, ‘Sesame Street in Communities’ says it “brings free video content of everyone’s favorite, furry Muppet friends as they help children and the adults in their lives reach their highest potential. Grover and the gang will tackle a variety of topics that face children in the areas of health and well-being, school readiness, and emotional well-being.”

This video specifically shows a young girl named Salia with Karli, and they bond over the fact that their parents have had the same problem, addiction. And they’re asking children, “Who are some friends or trusted adults you can talk to?”

Watch it here: