>>20789
If you want a technical answer then July 13th, 2019 - squid cosplay showing her bare shoulders when she just turned 16.
If you want an ideological answer then October 11th 2019 - black cat D.Va where she gained a bitchy attitude and was sympathetic to whoring out.
If you want a somewhat generous answer then March 8th 2020 - Ahri cosplay; became an overwatch egirl thot
If you want the most obvious and lenient answer about when your thot became a whore then June 24, 2020 - ripe age of 17 miming 'lay me on the bed, to see if i can take it'.