diff --git a/src/uncategorized/recETSWorkaround.tw b/src/uncategorized/recETSWorkaround.tw
index 2c4000860e915c40650a7857258f1fe330b6b99a..3e4fdcb9d39cceb24d7be344db63e5b635fa7426 100644
--- a/src/uncategorized/recETSWorkaround.tw
+++ b/src/uncategorized/recETSWorkaround.tw
@@ -649,7 +649,7 @@ You turn to the child clutching her mother's grotesque belly.
 <<AddSlave $activeSlave>>
 
 <<switch $RecETSevent>>
-	<<case "incest mother son" "incest father daughter" "incest brother sister" "incest sister sister" "incest brother brother" "incest mother daughter" "incest father son">>
+	<<case "incest mother son" "incest father daughter" "incest brother sister" "incest sister sister" "incest brother brother" "incest mother daughter" "incest father son" "incest twin sister" "incest twins mixed" "incest twin brother">>
 		<<include "newSlaveIncestSex">>
 	<<default>>
 		/* do nothing */