diff --git a/1.4/Defs/PreceptDefs/Precepts_Incest.xml b/1.4/Defs/PreceptDefs/Precepts_Incest.xml
index 3a36a95..23f82de 100644
--- a/1.4/Defs/PreceptDefs/Precepts_Incest.xml
+++ b/1.4/Defs/PreceptDefs/Precepts_Incest.xml
@@ -111,6 +111,15 @@
     <displayOrderInIssue>60</displayOrderInIssue>
     <displayOrderInImpact>1000</displayOrderInImpact>
     <defaultSelectionWeight>100</defaultSelectionWeight>
+    <modExtensions>
+      <li Class="RJWSexperience.Ideology.Precepts.DefExtension_Incest">
+        <allowManualRomanceOnlyFor>
+          <li>CloseRelative</li>
+          <li>FarRelative</li>
+          <li>NotRelated</li>
+        </allowManualRomanceOnlyFor>
+      </li>
+    </modExtensions>
   </PreceptDef>
 
   <PreceptDef>
@@ -157,6 +166,12 @@
           </li>
         </rules>
       </li>
+      <li Class="RJWSexperience.Ideology.Precepts.DefExtension_Incest">
+        <allowManualRomanceOnlyFor>
+          <li>FarRelative</li>
+          <li>NotRelated</li>
+        </allowManualRomanceOnlyFor>
+      </li>
     </modExtensions>
   </PreceptDef>
 
@@ -275,6 +290,12 @@
           </li>
         </rules>
       </li>
+      <li Class="RJWSexperience.Ideology.Precepts.DefExtension_Incest">
+        <allowManualRomanceOnlyFor>
+          <li>CloseRelative</li>
+          <li>FarRelative</li>
+        </allowManualRomanceOnlyFor>
+      </li>
     </modExtensions>
   </PreceptDef>
 
diff --git a/Source/IdeologyAddon/IdeologyAddon.csproj b/Source/IdeologyAddon/IdeologyAddon.csproj
index d23b8ae..63f6689 100644
--- a/Source/IdeologyAddon/IdeologyAddon.csproj
+++ b/Source/IdeologyAddon/IdeologyAddon.csproj
@@ -53,6 +53,7 @@
     <Compile Include="Harmony.cs" />
     <Compile Include="HistoryEvents\ArgsNamesCustom.cs" />
     <Compile Include="Keyed.cs" />
+    <Compile Include="Precepts\DefExtension_Incest.cs" />
     <Compile Include="PreceptWorkers\ThoughtWorker_Precept_GenitalSize.cs" />
     <Compile Include="PreceptWorkers\ThoughtWorker_Precept_GenitalSize_Social.cs" />
     <Compile Include="PreceptWorkers\ThoughtWorker_Precept_NonPregnant.cs" />
@@ -98,7 +99,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Krafs.Rimworld.Ref">
-      <Version>1.4.3542</Version>
+      <Version>1.4.3555</Version>
     </PackageReference>
     <PackageReference Include="Lib.Harmony">
       <Version>2.2.2</Version>
diff --git a/Source/IdeologyAddon/Patches/Rimworld_Patch.cs b/Source/IdeologyAddon/Patches/Rimworld_Patch.cs
index 55f3ba6..de49fe7 100644
--- a/Source/IdeologyAddon/Patches/Rimworld_Patch.cs
+++ b/Source/IdeologyAddon/Patches/Rimworld_Patch.cs
@@ -80,29 +80,15 @@ namespace RJWSexperience.Ideology.Patches
 		public static bool RsiIncestuous(Pawn one, Pawn two)
 		{
 			PreceptDef incestuousPrecept = one.Ideo?.PreceptsListForReading.Select(precept => precept.def).FirstOrFallback(def => def.issue == VariousDefOf.Incestuos);
+			var allowManualRomanceOnlyFor = incestuousPrecept?.GetModExtension<DefExtension_Incest>()?.allowManualRomanceOnlyFor;
 			BloodRelationDegree relationDegree = RelationHelpers.GetBloodRelationDegree(one, two);
 
-			if (incestuousPrecept == null ||
-				incestuousPrecept == RsiPreceptDefOf.Incestuos_Disapproved ||
-				incestuousPrecept == RsiPreceptDefOf.Incestuos_Forbidden)
+			if (allowManualRomanceOnlyFor == null)
 			{
 				return relationDegree < BloodRelationDegree.NotRelated;
 			}
-			else if (incestuousPrecept == RsiPreceptDefOf.Incestuos_Free)
-			{
-				return false;
-			}
-			else if (incestuousPrecept == RsiPreceptDefOf.Incestuos_Disapproved_CloseOnly)
-			{
-				return relationDegree == BloodRelationDegree.CloseRelative;
-			}
-			else if (incestuousPrecept == RsiPreceptDefOf.Incestuos_IncestOnly)
-			{
-				return relationDegree == BloodRelationDegree.NotRelated;
-			}
 
-			// Modded incestuous precept?
-			return true;
+			return !allowManualRomanceOnlyFor.Contains(relationDegree);
 		}
 	}
 }
diff --git a/Source/IdeologyAddon/Precepts/DefExtension_Incest.cs b/Source/IdeologyAddon/Precepts/DefExtension_Incest.cs
new file mode 100644
index 0000000..f4e474d
--- /dev/null
+++ b/Source/IdeologyAddon/Precepts/DefExtension_Incest.cs
@@ -0,0 +1,16 @@
+using RJWSexperience.Ideology.Filters;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using Verse;
+
+namespace RJWSexperience.Ideology.Precepts
+{
+	/// <summary>
+	/// Special Def extension for the Incestuous issue precepts
+	/// </summary>
+	[SuppressMessage("Minor Code Smell", "S1104:Fields should not have public accessibility", Justification = "Def loader")]
+	public class DefExtension_Incest : DefModExtension
+	{
+		public List<BloodRelationDegree> allowManualRomanceOnlyFor;
+	}
+}