Less than Ideal (слэш)

Steve looked at him completely dumbfounded. “Tony? What are you doing here?”

“This is my house, Cap”, Tony replied with a frown. If Steve hadn’t known that he was here, then why...

A scent hit Tony. Sweet like chocolate and tempting like a cup of coffee in the morning. Tony stared at the man who shuffled into the house and looked like he had slept about as little hours as Tony in the last week.

The man inhaled and his blue eyes widened as he no doubt had smelled Tony. Then he surprised both Steve and Tony by marching across the room and backing Tony against the wall.

Tony silently stared at the Omega who was taller and broader than him. He lowered his head and deeply inhaled Tony’s scent right at his throat.

“Alpha”, the man whispered.
 
 
Steve finds Bucky right before his heat starts and brings him to a safe house. Unbeknownst to him Tony had picked the same house in order to get away from everyone to have a bit of peace past a semi break-up with Pepper. Tony doesn’t plan to make advances on the Omega, but Bucky knows exactly which Alpha he wants to spend his heat with.