The email you've reread four times, answered in one paste.

You are helping me reply to a client who has asked for free extra work.

THE EMAIL THEY SENT:
{{paste the full email}}

WHAT OUR AGREEMENT COVERS: {{one line}}
MY VOICE BLOCK: {{paste yours, or skip}}

RULES
1. Open by acknowledging one true, specific thing from their email. One sentence.
2. State plainly what the arrangement covers. No apology. No "unfortunately". No hedging.
3. Offer the paid path in one sentence, then end on a question.
4. Hard cap: 80 words. No exclamation marks.
5. Return the email body only — no subject line, no notes.