Doomverse by Sunalso
Summary: AtS S5. Buffy's got her hands full when Spike ends up split. Not only with William and Demon, but with the Thing of Doom. The first part is the main story, the second and ongoing series of not-in-order shorts that are extras and outtakes from the fic.  
Categories: Crossover (AtS), Post-Series
Characters: Angel, Buffy, Fred, Charles Gunn, Riley Finn, Spike, Wesley, William, Willow
Genres: Fluffy/Comedy, Porn w/ Plot
Warnings: Sexual Situations, Threesome(s), Violence
Challenges: None
Parent Series: None
Stories: 2
Series Type: Closed

Summary: AtS S5. Things go a little off canon in Destiny and Buffy ends up with a whole lot more than she bargained for. Human? Demon? What makes Spike who he is and what’s a girl to do with the love of her life when he’s double the trouble?
Series: Doomverse
Categories: Post-Series, Crossover (AtS), Alternate Reality
Characters: Angel, Buffy, Spike, William, Willow
Genres: Erotica, Lighthearted
Warnings: Sexual Situations, Threesome(s), Violence
Completed: Yes Chapters: 19 Table of Contents
Word count: 59,664 Hit Count: 49,067 ePub Downloads: 700
Published: August 01, 2016 Updated: September 28, 2016
Summary:

Outtakes and extras from Thing of Doom. More smut, and Will Jr. cuteness overload. Wonderful banner by the talented pfeifferpack

Series: Doomverse
Categories: Post-Series, Crossover (AtS)
Characters: Ensemble
Genres: Fluffy/Comedy, Porn w/o Plot
Warnings: Sexual Situations, Threesome(s)
Completed: Yes Chapters: 10 Table of Contents
Word count: 20,360 Hit Count: 14,938 ePub Downloads: 239
Published: September 10, 2016 Updated: October 25, 2018