Why he feels that his fiance had said something negative about him to me? It's weird and shocking?

I have a friend , someone told me negative things about him to me, so I wanted to check with my friend, i asked my friend saying i have heard some negative comments about you. He was like who told you is it my fiance, I was shocked i mean why will his fiance say something negative about him to me, I am still wondering,
Why he feels that his fiance had said something negative about him to me? It's weird and shocking?
Post Opinion