<human>: I recently met up with a friend of mine who I hadn't seen much of in the last few years. We've known each other since Middle School, and one of our greatest activities when hanging out was making "your mom" jokes to one another. However, I halted this grand tradition a few years back, when his mother passed away unexpectedly, and I tried really hard any time we talked on the phone or visited to NOT give into that impulse that had lasted many years.

Flash forward to this recent visit, and we're about to play a board game where the goal is to destroy the other player's army. I've got all my pieces set up, and am boasting about how I'm going to totally wreck him in the game. He looks at my pieces and says "All I see are a bunch of corpses!" Without thinking, I reply, "Your mom's a corpse!" Instantly, I felt absolutely terrible. The somewhat odd thing is that he actually found it funny, and laughed it off, while I apologized numerous times.

Give me the gist of the text in a nutshell
<bot>: My friend and I always used to make jokes about each other's mom until his passed away, I made one by accident.