Don't let the "typical sibling" silently sacrifice. Give him "special time" equal to his sibling's.

Repeat the same refusal in the same words calmly, no matter how the other person reshapes the pressure.

Say no in three sentences: thanks, refusal, closing — with no "sorry" or justification.

Memorize one 7-word refusal sentence and rehearse it until it emerges automatically under pressure.

Say "no, I can't" — complete sentence. No explanation, no apology.

Don't repeat instructions every message — set them once in System Prompt, save 70% writing time.