Also add the father/mother check to the childbirth ritual

1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs

@@ -1429,7 +1429,9 @@ namespace RJW_Menstruation
                                     pregnancy = HediffMaker.MakeHediff(HediffDefOf.PregnantHuman, Pawn);
                                     if (Configurations.EnableBiotechTwins)
                                         pregnancy.TryGetComp<HediffComp_PregeneratedBabies>().AddNewBaby(Pawn, egg.fertilizer);
-                                    ((Hediff_Pregnant)pregnancy).SetParents(Pawn, egg.fertilizer, PregnancyUtility.GetInheritedGeneSet(egg.fertilizer, Pawn));
+                                    Pawn father = egg.fertilizer;
+                                    if (Pawn == father) father = null;
+                                    ((Hediff_Pregnant)pregnancy).SetParents(Pawn, father, PregnancyUtility.GetInheritedGeneSet(father, Pawn));
                                     Pawn.health.AddHediff(pregnancy);
                                     pregnant = true;
                                     deadeggs.Add(egg);

1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs

@@ -234,6 +234,7 @@ namespace RJW_Menstruation
                     {
                         Pawn baby = comp.PeekBaby();
                         Pawn thisFather = baby.GetFather() ?? father;
+                        if (thisFather == geneticMother || thisFather == mother) thisFather = null;
                         baby.relations.ClearAllRelations();   // To keep ApplyBirthOutcome from erroring when it tries to set up relations
 
                         PregnancyUtility.ApplyBirthOutcome_NewTemp(thisOutcome, quality, ritual, genes, geneticMother, birtherThing, thisFather, doctor, lordJobRitual, assignments, preventLetter);
@@ -293,6 +294,7 @@ namespace RJW_Menstruation
                     {
                         Pawn baby = comp.PeekBaby();
                         Pawn thisFather = baby.GetFather() ?? father;
+                        if (thisFather == geneticMother || thisFather == mother) thisFather = null;
                         baby.relations.ClearAllRelations();
 
                         PregnancyUtility.ApplyBirthOutcome(outcome, quality, ritual, genes, geneticMother, birtherThing, thisFather, doctor, lordJobRitual, assignments);

About/Manifest.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <Manifest>
 	<identifier>RJW Menstruation</identifier>
-	<version>1.5.0.1</version>
+	<version>1.5.0.2</version>
 	<dependencies>
 	</dependencies>
 	<incompatibleWith />