If bleeding stops before the 10-day maximum exactly at the completion of a woman's established habit, what does the matn require before intercourse becomes lawful?

Menstruation: Definition, Durations, Prohibitions, and End-of-Menses Rules

• Nothing; stopping alone is always enough.
• One of the stated routes: Ghusl, or valid Tayammum followed by prayer, or the stated prayer-time consequence.
• Only drinking water.
• Waiting exactly 15 days in every case.