So when Jyn and Foa first met, it was Zamori who hooked them up since he knew both of them discretely. Jyn set up the date and they would chill over at a hill side with clear views, but Jyn would never reveal her natural state to Foa because Zamori said that Foa was into wild girls, so they would meet up everynight the same way until a fullmoon came to reveal Foa's were form that's when Jyn thought it was the oppurtunity to show him her smaller natural state. After that exchange, they truly felt love for each other, and been together since.
