diff --git a/src/endWeek/endWeekUtils.js b/src/endWeek/endWeekUtils.js
new file mode 100644
index 0000000000000000000000000000000000000000..3e17832622d65ed1b2344ef252371619a0a7f24a
--- /dev/null
+++ b/src/endWeek/endWeekUtils.js
@@ -0,0 +1,14 @@
+/**
+ * Sets slave's fetish
+ * @param {App.Entity.SlaveState} slave
+ * @param {string} fetish
+ * @param {int} strength
+ */
+globalThis.fetishChange = function(slave, fetish, strength = 65) {
+	slave.fetish = fetish;
+	slave.fetishStrength = strength;
+	slave.fetishKnown = 1;
+	if (App.EndWeek.saVars) {
+		App.EndWeek.saVars.fetishChanged = 1;
+	}
+};
\ No newline at end of file
diff --git a/src/endWeek/saSharedVariables.js b/src/endWeek/saSharedVariables.js
index 67d1dbc0bd714ee11f025a500e93f50f432e4b42..8186fe687875f9c4a5af45e3d5f96b5132d31485 100644
--- a/src/endWeek/saSharedVariables.js
+++ b/src/endWeek/saSharedVariables.js
@@ -45,6 +45,8 @@ App.EndWeek.SASharedVariables = class {
 		this.pornFameBonus = 1;
 		/** Used to condense all the possible galactorrhea lactation start points to a single line of text in saLongTermPhysicalEffects. */
 		this.inappropriateLactation = 0;
+		/** Used limit a slave to a single fetish change per week. */
+		this.fetishChanged = 0;
 		/** TODO: move V.slaveUsedRest here after saRules is converted, and find others */
 	}
 
diff --git a/src/js/utilsSlave.js b/src/js/utilsSlave.js
index 08c031f857896596e3e96e3643f1e404bc0c6410..5fe7731b0a64e687baddc622629b86d0885d1008 100644
--- a/src/js/utilsSlave.js
+++ b/src/js/utilsSlave.js
@@ -2070,7 +2070,7 @@ globalThis.fetishChangeChance = function(slave) {
 		fetish = (slave.fetishStrength / 4),
 		sex = 0;
 
-	if (slave.clitSetting !== slave.fetish) {
+	if (slave.clitSetting !== slave.fetish && !(App.EndWeek.saVars && App.EndWeek.saVars.fetishChanged === 1)) {
 		// fetish should be more uncertain leading towards puberty and then steadily become more set in stone afterwards
 		if (slave.balls) {
 			if (V.potencyAge >= slave.actualAge) {