we are afraid of this happening too. I could never love the kid and wont even try to. she might feel different so this causes us a problem.
i have had a vasectomy so i know im safe, but she is scared of getting pregnant and rightfully so. we think we will only play with V-safe guys (condoms regardless) or soft swap with guys not v-safe from now on. she doesnt wanna go on the pill anymore especially since she doesn't need it with me.
and to answer the question, I would obviously know it wasn't mine..