Write a mature story, including dialogue, set in the Resident Evil universe. Ada Wong manages to lock Leon S. Kennedy in a reverse headscissors. As Leon tries to free himself, Ada begins to unbuckle his belt and free his member. While continuing to choke him with her thighs, Ada also starts to pleasure Leon with her mouth. Leon doubles his efforts, but Ada has both of his heads securely in her grasp. Finally, Leon taps out signalling his surrender, but Ada ignores him. She keeps working him with her mouth and squeezing his neck with her thighs until he simultanously explodes into her mouth and passes out to her headscissors. With Leon drained and unconscious, Ada smiles happily, content with her work.