Severus had a blessed life in this world. There were times when he wondered how on Earth he deserved such an amazing life, and then he'd Dream. And in his dreams his existence was absolutely miserable. Perhaps this life was some sort of kharmic apology for everything he had to go through in that Dream Life.
Then Daisy started attempting to do headstands. Severus moved over to try and give her help. The girl's princess dress flopped down around her tummy and exposed My Little Ponies on her underpants. Big Girl Underpants! She'd chosen them herself!