False Modesty?

So Tessie and I were looking at photos together when we came across a few of her.

Tessie: Aww, cute!
Me: Don't say that about pictures of yourself, it's immodest.
Tessie: What does 'immodest' mean?
Me: To be immodest is to be too proud of yourself. It's like showing off.
Tessie: But I am proud of myself.
Me: You should be, but don't be too proud of yourself.
Tessie: I'm proud of myself but not too proud of myself. I'm perfect!

That backfired...