Optimized incest checks

Source/IdeologyAddon/RelationHelpers.cs

@@ -11,6 +11,11 @@ namespace RJWSexperience.Ideology
 		/// </summary>
 		public static BloodRelationDegree GetBloodRelationDegree(Pawn pawn, Pawn partner)
 		{
+			if (!pawn.relations.FamilyByBlood.Contains(partner))
+			{
+				return BloodRelationDegree.NotRelated;
+			}
+
 			PawnRelationDef closestBloodRelation = pawn
 				.GetRelations(partner)
 				?.Where(def => def.familyByBloodRelation)

Source/IdeologyAddon/RomanceChanceFactorHelpers.cs

@@ -17,11 +17,10 @@ namespace RJWSexperience.Ideology
 		/// </summary>
 		public static float GetRomanceChanceFactor(Pawn pawn, Pawn partner)
 		{
-			IEnumerable<PawnRelationDef> relations = pawn.GetRelations(partner).Where(def => def.familyByBloodRelation);
 			PreceptDef incestuousPrecept = pawn.Ideo?.PreceptsListForReading.Select(precept => precept.def).FirstOrFallback(def => def.issue == VariousDefOf.Incestuos);
 			float romanceChanceFactor = 1f;
 
-			if (!relations.Any())
+			if (!pawn.relations.FamilyByBlood.Contains(partner))
 			{
 				if (incestuousPrecept == RsiPreceptDefOf.Incestuos_IncestOnly)
 				{
@@ -33,6 +32,7 @@ namespace RJWSexperience.Ideology
 				}
 			}
 
+			IEnumerable<PawnRelationDef> relations = pawn.GetRelations(partner).Where(def => def.familyByBloodRelation);
 			foreach (PawnRelationDef relationDef in relations)
 			{
 				romanceChanceFactor *= GetRomanceChanceFactor(relationDef, incestuousPrecept);