The days and weeks passed, and Alex and Sarah's relationship continued to blossom. They spent most of their time together, either in their apartment or out on missions together. They had never felt so happy and fulfilled.
But as much as they wanted to keep their relationship a secret, they knew it was only a matter of time before the truth came out. And one day, that moment finally arrived.
They were out on a mission, fighting off a group of villains who were causing chaos in the city. Alex was taking care of one group of villains, while Sarah was dealing with another.
But then, Sarah saw something that made her blood run cold. One of the villains had managed to get hold of Alex and was holding him hostage.
"Let him go!" Sarah shouted, running towards them.
The villain laughed.
"Why should I?" he said. "I've got the famous Sentinel right where I want him."
Sarah gritted her teeth, ready to attack. But before she could, the villain pulled off Alex's mask, revealing his identity to the world.
Gasps and murmurs rippled through the crowd as they realized that the city's beloved hero was actually living with the notorious villain, Shadow.
Sarah's heart sank as she saw the looks of shock and horror on people's faces. She knew that their lives would never be the same again.
But then, something unexpected happened. Instead of turning on them, the crowd started to cheer.
"Sentinel and Shadow? Together? That's amazing!" one person shouted.
"Who would have thought that the greatest superhero and supervillain were roommates?" another added.
Alex and Sarah looked at each other in disbelief. They had been so worried about what would happen if their secret came out, but it seemed like the world was ready for something new and exciting.
And as they looked out at the crowd, hand in hand, they knew that they were ready to face whatever came their way. Together.