Aww moment 345

I was reading an email from my niece in Belgium.

Me - Kaatje asks how you're going?
Ella - Good.
Me - Is that all you want to say to her?
Ella - "Ik hou van jou."
Me - Do you want to write it yourself? You can write it in English.
Ella - Why can I write it in English?
Me - Because Kaatje understands English now. She's learning it at school.
Ella - Does she know 'I love you'?
Me - I think she does.
Ella - Because school told her that the first day she went there, because it's so important to know that word.