She'd known going in that we were mutants. We confided in her because we felt she should know since mutant births can be...unpredictable. But no one could have predicted this. Except...I should have. 
Appearing in "Multiple Birth"
Featured Characters:
Supporting Characters:
- Sean Madrox (First appearance; dies)
- O*N*E
Other Characters:
- Hector Munoz
- Banshee (Sean Cassidy) (Mentioned)
Races and Species:
Locations:
Synopsis for "Multiple Birth"
- Synopsis not yet written
Solicit Synopsis
Witness the most important event in the lives of Jaime Madrox and Siren - the birth of their baby! What will happen to X-Factor - and what will be the meaning for mutantkind! All we can guarantee are that the answers are not what you expect - but that's what makes it X-Factor! Don't miss what is sure to be one of the most talked about books of 2009!
Notes
- The cover is incorrectly credited to David Yardin and Nathan Fairbairn. This was corrected in the next issue.
- This issue includes a personal plea from Peter David not to spoil the contents of the issue.