1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Breast.cs

@@ -210,16 +210,25 @@ namespace RJW_Menstruation
         protected long CalculateLastBirth()
         {
             long youngestAge = (long)(BabyHalfAge * GenDate.TicksPerYear) * -2; // So a newborn isn't considered a new mother, either
-
-            if ((Pawn.relations == null)) return youngestAge;
-
-            bool hasChild = Pawn.relations.Children.
-                Where(child => !Pawn.health.hediffSet.GetHediffs<Hediff_BasePregnancy>().Any(preg => preg.babies.Contains(child))). // no fetuses
-                Where(child => child.GetMother() == Pawn).  // not Dad
-                TryMinBy(child => child.ageTracker.AgeBiologicalTicks, out Pawn youngest);
-
-            if (hasChild) youngestAge = Pawn.ageTracker.AgeBiologicalTicks - youngest.ageTracker.AgeBiologicalTicks;
-
+            if ((Pawn.relations?.ChildrenCount ?? 0) > 0)
+            {
+                foreach (Pawn child in Pawn.relations.Children)
+                {
+                    bool isFetus = false;
+                    if (Pawn.health.hediffSet.GetHediffs<Hediff_BasePregnancy>().Any(preg => preg.babies.Contains(child)))
+                    {
+                        isFetus = true;
+                        break;
+                    }
+                    
+                    if (
+                        Pawn.ageTracker.BirthAbsTicks - child.ageTracker.BirthAbsTicks > ageOfLastBirth &&
+                        !isFetus &&
+                        child.GetMother() == Pawn                        // Don't do Dad's boobs
+                        )
+                        youngestAge = Pawn.ageTracker.BirthAbsTicks - child.ageTracker.BirthAbsTicks;
+                }
+            }
             return youngestAge;
         }
 
@@ -328,11 +337,6 @@ namespace RJW_Menstruation
             }
         }
 
-        public void GaveBirth()
-        {
-            ageOfLastBirth = Pawn.ageTracker.AgeBiologicalTicks;
-        }
-
         public void AdjustNippleProgress(float amount)
         {
             nippleProgress = Mathf.Clamp01(nippleProgress + amount);

1.3/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs

@@ -72,7 +72,6 @@ namespace RJW_Menstruation
             pawn.health.RemoveHediff(this);
             HediffComp_Menstruation comp = this.GetMenstruationComp();
             if(comp != null) comp.Pregnancy = null;
-            pawn.GetBreastComp()?.GaveBirth();
         }
 
         public string GetBabyInfo()