Today, my cat made me a present. I woke up with a mouse in my bed.
This was the good news, as I find it to be very cute of him (even though the mouse was still alive when I woke up, it died moments later.)
The bad news, my sister left the freezer open for several hours when I was out. Everything inside it thawed and we had to throw the food away. Not to mention the room being flooded. My mother cooked the meat that was still okay, so it won't spoil either.
Now we're going to eat mincemeat for the next few days. We're so mad at each other right now, you can't believe it.
Your cat brought you a mouse because he or she thinks you are a terrible hunter incapable of catching anything and doesn't want you to go hungry. Basically, your cat wanted you to have some breakfast in bed. Disgusting but sweet.