Should I give ultimatum but analyze: will it work? Map ultimatum: clear boundary vs. manipulation vs. last resort. Calculate: likelihood they'll change vs. resentment created vs. relationship quality. Show me the ultimatum reality: sometimes necessary boundary, often relationship death. Give me the truth: ultimatum is appropriate here, I'm trying to force change. Include: whether ultimatum is justified, if they'll resent it even if they comply, and whether I should just leave instead.