You knew who was stealing your hoodies the moment they started going missing. That doesn’t mean that you did anything about it. You knew who took them and you knew that they’d end up in your safe house again. You’re not worried.
It’s not like Jason even knows that you know he’s an omega. He’s been parading around as a beta ever since he became Robin and it’s even more important now that he’s Red Hood. Could you imagine how the criminal underground would react if they found out that the man who took over is an omega? They’d riot. So you don’t tell anyone that you know, not even Jason.
It’s sweet. He finds comfort in you, views you as safe. That’s why he takes your hoodies. He takes them for his nest so he can sleep surrounded by your scent. The knowledge is intoxicating. It should be taken as courting but since Jason doesn’t know that you know he’s the one taking the hoodies you don’t bring it up.
You get to your safe house late at night after patrol. You had planned on making ramen then crashing but there’s a light on in your room. Since it’s Gotham you slowly and quietly make your way through the safe house, a weapon drawn just in case. It could be anyone. A robber, a villain who somehow found your safe house, an ex. It’s better to be safe than sorry.
Instead of finding a threat, you find Jason. Jason who currently has a broken arm and would have had to climb the fire escape to break in. Jason who was meant to be resting in his own safe house. Instead you find him rummaging through your laundry like a raccoon as he searches for something that’s potent with your scent.