Biological Imperative
stuckytrash (Watsittoyou)

Summary:
“I want to have a baby.”
Steve managed not to spit his coffee in Bucky’s face.
“Well, for that, you’d usually need a boyfriend.”
“I was kind of hoping that… that you’d…”
Oh.
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In which Bucky wants to have Steve's baby, and Steve is a very concerned dad-to-be.