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1. tummy time by DairyFarmer

   Fandoms: Batman - All Media Types, Robin (Comics), DCU (Comics)  

   • Explicit
   • Underage Sex
   • F/M
   • Complete Work

   16 Apr 2026

   Tags

   • Underage Sex
   • Cassandra Cain/Tim Drake
   • Tim Drake (DCU)
   • Cassandra Cain
   • Underage Sex - Freeform
   • Creampie
   • Trans Tim Drake (DCU)
   • Trans Cassandra Cain
   • t4t
   • Unsafe Sex
   • Vaginal Sex
   • Tim Drake Has a Vagina (DCU)
   • Vaginal Fingering
   • Barebacking
   • Bruce gave neither of them The Talk
   • Breastfeeding
   • sort of but cass tries
   • Loss of Virginity
   • Sibling Incest
   • tim thinks of them as twins

   Summary

   Cass's finger was thin and gingerly pressed into Tim with some curiosity.

   "Here?" She asked, voice a little strained and croaked like she’d gone too long without drinking water.

   Tim made a slight face at the feeling of the finger pressing in a little more and touching Tim's fleshy, twitching walls. It felt...weird feeling something press into him and just keep going.

   It wasn’t bad, it was just…odd.

   "I think so," Tim eventually replied back.

   ____
   Cass hits puberty and goes to Tim for help. Tim, of course, helps.

   Series

   • Part 17 of Piquancy

   Language:

   English

   Words:

   5,792

   Chapters:

   1/1

   Comments:

   5

   Kudos:

   185

   Bookmarks:

   22

   Hits:

   2,042