Grandma adopted a puppy when I was probably 8 or 9. It got parvo. I remember going to her house and asking where the puppy was. She told me that he was sick, so he had to stay outside and I couldn't go outside for the same reason. When I would ask where the puppy is, she would tell me that he's on the side of the house where I couldn't see him. This went on for a long time, I never saw the puppy again and eventually forgot about it entirely.

A decade or two later I found out that my grandma had spent thousands of dollars trying to keep that puppy alive, but parvo took it anyways. She was very upset about it's passing and instead of having me go through it too, she lied to me about it until I completely forgot about it.