I accidentally killed my brother’s pet goldfish because I forgot to stop by his apartment to feed it!!

I know it’s just a pet, but god knows how much my bro cherished that little thing. Now I’m all caught up. Should I just tell him? Or cover it up by getting an identical one from the pet store? He’s out of town on a real singles tour for a few days and I don’t want him to think he can’t rely on me for something as simple as feeding his precious goldfish.

What do you guys think?