My fiancée’s friend is flirting with me?

First things first i really love my fiancé but i know his personality too well. He is very jealous, and possessive especially over me. If i dare tell him that his friend dared flirt with me he will actually go to jail. He will be happy about it too, he is very angry and impulsive not towards me but for me. He is also not western and he is very traditional and believes the women of his house, me , his mom, sister are a NO go. No man could dare to do anything to us and he is willing to go to jail for us 💀 with all that being said i am very scared to approach him with this information. I am trying to resolve it without him knowing a thing but i don’t know how. His friend has repeatedly flirted with me over text and in person and he visited our house when my fiancé wasn’t home, i did not open the door for him but he was telling me to open for him and he was there to see me and i told him i’d rather not let you in if my fiancé is not home. I was also confused as to why he was visiting me to begin with since he is not my friend. I am scared of this man and he is blunt about liking me and i am scared for my fiancée and mysef but i am also scared of letting him know. How can i scare off this man? Mind you he has a wife!!! I would’ve told her if she wasn’t pregnant i am sure this will break her heart.
My fiancée’s friend is flirting with me?
Post Opinion