I was recently rereading a story which fits the above description, and I was wondering how many others are out there. I don't care if it's baby-Gus or another baby. I know of the following:
Giant Steps by Ashleigh Kinnerson, in which Justin takes an active role in Gus's conception.
Bell, Book, & Candle by
gaedhal, an AU set in the 50's in which Brian and his girlfriend/beard, Lindsay, conceive a baby. When Brian refuses to marry her, she plans to give the baby up for adoption.
I is for Inuksuk by Moonshadow Woman, in which Gus was conceived during Brian and Lindsay's college phase. Brian only learns of Gus's existence years later when Mel and Linds die in a fire.
Others I remember, but I need help remembering titles:
(1) Brian and Justin are living in NYC. Lindsay and Mel seperate and are fighting for custody of Gus. (There is no JR.) Lindsay and Brian, missing Gus, get drunk and "console" one another. Gus's baby sister is conceived that night. (Update: It's
Reconstructing Brian by Randall Morgan. Thanks,
court1429.)
(2) I know I've read other fics in which Brian and Lindsay's college experimentation led to Gus being conceived.
And again, ANY others you can think of that fit this request. Thanks!
Update: I've gotten one rec that fits that request, but still looking for many more.