Keeping Secrets, Telling Lies (слэш)

This is an A/B/O AU where the Avengers are a superhero team tasked with defending the Earth from all manner of planetary and otherworldly threats.
However, amidst the scourge of aliens and extremist metahumans, a war over equality for the genders is also brewing, a war which means that resident SHIELD tech-genius (and son of Howard Stark) Tony can only contribute to the world as the head of R&D’s assistant, a model and Ironman under the cover of suppressants and well crafted alibis.
At the age of twenty five, his superhero career of three years going strong and without any major hitches (regardless of Doom’s death-rays and the Mandarin’s obsession with destroying him) Tony feels relatively secure, happy even... Until, quite unexpectedly, Thor’s deadly (gorgeous), devious little-brother corners him after a photo-shoot in Central Park, drags him off to the nearest cafe and proceeds to tell him that his secret identity will be exposed, unless...
(Please see the ‘Notes’ section for further information and warnings)