Cravings

Steve loved his Omega. He would go to war time and time again for his Omega. He would give his life a million times over for him if he ever had to.
He had been ecstatic when Bucky had told him he was pregnant. Steve had been there every step of the way since then. The morning sickness, the mood swings, the crying over the most miniscule things; Steve was genuinely honored to be the one experiencing these things with Bucky.

But the Cravings.
Good Gods above.
The Cravings.

Those might just be the one thing that finally take down the incredible Captain America...