Labra did well at school that Angela went down to McDonald's to get her a happy meal for her good behavior like how a mother would reward her child for good behavior. Maybe Angela got Labra a mouth watering cheeseburger with fries and a drink with a toy inside of course.
Sorry for the sloppy writing so here's what they're saying.
Angela: Since you've been such a good girl I decided to get you a Happy Meal. Labra: Yay! Thank you Angela-Labu! X3
P.S. there isn't a lot of diapered Angela art so I decided to draw her in a diaper because why not.