Confused need advise

Megan
My SO gets upset when i don't give all the details of what I'm explaining. But at the same time, at times i feel like im on eggshells if i say the wrong thing. I mentioned a past event that dealt with an exs child, and he became mad bcuz i spoke in detail which included my ex bcuz its their son. And he doesn't want my past mentioned bcuz he says they still are on my mind. Which is far from the case... im lost