Well, now, some of those things are partly true, Ginny. The twins indeed did turn Ron's teddy bear into a giant spider, but it's not as though I let them do so. If you'll recall, I made them spend the next entire day de-gnoming the garden. And the twins did play pranks on Percy, but I did scold them and punish them when they were too malicious.

But no, the rest of those things are not true, Ginny. Bill has never Obliviated or punished you, and Fred and George never killed any pet of yours.

I believe you when you say you remember those incidents, though, dear.