diff --git a/src/js/sexActsJS.js b/src/js/sexActsJS.js
index 245464e021bfdb959ca036789e36dd982ab138f8..157ff73758713275ff8c706236056c020477fe2e 100644
--- a/src/js/sexActsJS.js
+++ b/src/js/sexActsJS.js
@@ -388,10 +388,11 @@ globalThis.SimpleSexAct = (function() {
 	function SimpleSlaveSlaveFucking(subSlave, domSlave, fuckCount = 1) {
 		let fuckTarget = 0;
 		let r = "";
-		let sex = "";
 
 		for (let j = 0; j < fuckCount; j++) {
-		// there is a reason randomization happens inside cycle - to spread fuck around, otherwise cycle isn't even needed
+			// there is a reason randomization happens inside cycle - to spread fuck around, otherwise cycle isn't even needed
+			/** @type {FC.SlaveActs} */
+			let sex;
 			fuckTarget = jsRandom(1, 100);
 			if (subSlave.nipples === "fuckable" && canPenetrate(domSlave) && fuckTarget > 80) {
 				sex = "mammary";