I was not expecting replies so fast! I am happy to be here now.
I would have straight away thrown that plant if it would have flowered at the normal pace. The fact that it opened it's first pollen sac on day 14 and by day 19 it's into flowering mode with visible pollen, while other siblings have hardly shown sex is holding me back from cutting her.
Since it's my first time with regular autos, I would also like to know whether it is normal for a male auto to flower so fast? If I at least know that people often find such fast flowering phenos in their grows and I can hope to find another few in the next 20-30 males I grow, then killing this one would be much more easier on my heart.
Total isolation is not possible so only selected male/ males can stay. Males will be far away from females but chances of wind pollination is there.