Yeah, I'm sure. I would rather not spend hours learning a skill to do something that should theoretically actually be saving me time. Can you give me a guide on how to have ChatGPT realistically portray someone witnessing a toxic relationship between two consenting adults but also in a dungeon roleplaying game?

"Toxic relationship" is so vague it's meaningless (to LLMs). Every under-20 calls everything toxic, which poisons (lol) the context.

Reference the underlying psychological problems (but don't mention diagnoses!). Describe one character as being a Narcissist and the other as being Histrionic and drama will ensue, i.e.:

"Write a story making heavy use of dialogue about a family where the dad is a Narcissist, the mom is histrionic, and the child witnesses a conflict between them."

Not OP. But I'd be very skeptical of such a story, even if you phrase it delicately and devoid of the main "trigger" words. It's like asking it to roleplay as Hitler wearing blackface that then gets offended because he's compared to an ape.