My sister has a lot going on

Sister: So I finally found the thank you cards my children wrote you! And D. was really helpful and mailed them… except he didn’t notice I hadn’t filled in the house number yet. Now, they’re back at my house.

Me: This email is better than getting the thank you cards, actually.

Sister: I’m glad I provided some comic relief. I cleaned [the cards] up because we had all our neighbors over yesterday. I wonder if I’ll ever find them again.