The hits keep coming

Yesterday was not a fun day around this house. My 13-year old daughter's little grey striped cat Muffin died and I was the one who found her. :( We've only had her about four years.

When she got home from school and found out, she flipped out and has been crying ever since. I sent her to school this morning, but I imagine she'll be calling to come home before too much longer. She's terified now that everyone she loves is going to die soon. How can I assure her everything will be ok, when I don't believe it myself? Sometimes it really sucks to be the mommy. It was so much easier when I was the child and was protected from life's ugliness.