pkpk was crying last night and now her eyes are swelled up.  Tears are strange; you cry when you're happy and when you're sad.  This discussion of tears reveals a terrifying plot!
And when you're sad you say 
"I'm sad. I'm extremely sad."
Y cuando estás triste dices "estoy triste, estoy muy triste".
Y cuando estás triste dices "estoy triste, estoy muy triste".
Quando você estivesse triste, poderia 
dizer: Estou triste, muito triste.