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1. Lost in Fatherhood by artenoencontrado

   Fandoms: X-Men (Movieverse)  

   • Explicit
   • No Archive Warnings Apply
   • M/M
   • Complete Work

   21 Sep 2026

   Tags

   • No Archive Warnings Apply
   • Erik Lehnsherr/Charles Xavier
   • Erik Lehnsherr
   • Charles Xavier
   • Sebastian Shaw
   • Peter Maximoff (X-Men Alternate Timeline Movies)
   • Alternate Universe - Modern Setting
   • Alternate Universe - College/University
   • Top Erik Lehnsherr
   • Bottom Charles Xavier
   • Mpreg | Male Pregnancy
   • Male Lactation
   • Lactation Kink
   • Age Difference
   • Older Erik Lehnsherr
   • Young Charles Xavier
   • Established Relationship
   • Anal Sex
   • Charles Xavier Loves Erik Lehnsherr
   • Honestly Charles What Are You Thinking | Charles Xavier's Poor Decision Making Skills
   • Erik Lehnsherr Loves Charles Xavier
   • Smitten Erik Lehnsherr
   • Sebastian Shaw Being an Asshole
   • Light Angst
   • Fluff and Angst
   • Mutual Pining
   • Semi-Public Sex
   • Erik Lehnsherr Has a Big Dick
   • Relationship Problems
   • Jealous Erik Lehnsherr
   • Pregnant Charles Xavier
   • Power Dynamics
   • Charles Xavier Has Hair
   • Charles Xavier Can Walk
   • Movie: X-Men: First Class (2011)

   Summary

   When you're forty-five, you can't imagine buying diapers every week. But Erik knows a little bit of that since he impregnated his problematically young boyfriend.

   Language:

   English

   Words:

   49,215

   Chapters:

   15/15

   Comments:

   37

   Kudos:

   307

   Bookmarks:

   60

   Hits:

   9,529