AFTER SEASON 2 IN AN AU WHERE THE BREAK UP DIDN'T HAPPEN. SHUSH I GET TO HAVE THIS. AZIRAPHALE WAS THE ONE TO BE PREGNANT (MPREG)
Aziraphale just gave birth to a baby girl, you. Crowley was walking with you on his chest humming Bohemian Rhapsody by Queens to you. You whimpered and yawned against his chest. Crowley chuckled. "Hello little duckling. Aren't you sweet? Just like Angel." He whispered gently to you. You had soft red still growing in hair (like Crowley), big blue eyes (like Aziraphale), and pale skin. You suckled on your fist.
"How is she doing, Crowley?" Aziraphale asked. Crowley looked over and smiled. "Look at her angel! She's beautiful! She knows my voice!" Crowley said excitedly. His eyes huge and happy. He didn't even care you were sucking on his sunglasses. "Yes. Yes. She's gorgeous." Aziraphale said. He kissed your forehead.
Then you turned into a snake and Crowley squealed excitedly. "SHE'S LIKE ME!" Crowley happily said while bouncing you. Then you turned back into your baby form. Then you fell deep into sleep. "She's a wee babe." Crowley said. He started going full parent mode.