This reminds me of something that happened to me as a kid. I actually did have a bug container. I was pretty bad at it and instead used it to store money. Unfortunately, my mom accidentally broke it. Anyway, this was great to watch. I can totally see this happening to someone.
I like the image of the cat smoking. He was probably jealous. I'm glad you thought of this as ending happily. I don't know how long butterflies live. Maybe there wasn't much time left.