You tell her.
You indirectly allude to it.
You don't say anything.
You tell it to everybody.
You console her.
You tell her she deserves it.
You completly forget and you ask him how his dog is.
You leave flowers in front of the door.
You leave a recipe with dog in front of his door.
You congratulate him.
You are mean with his fiancé.
You pretend to be happy for them.
You say it's delicious.
You don't lie : it's really repulsive.
You tell her she musts try again.