Whose The Boss?

While visiting our neice in another state, she had hired a contractor to do some work at her house which happens to be the same line of work that my fiance does.  She didn't want her uncle to do the work because he was on vacation, he didn't have his equipment with him and this guy she hired was cheap enough.  The day of the scheduled work, our neice was at work, and the guys she hired were in the back yard doing the construction work.  Our lodging is about a mile away so on our way to the beach we stopped by her house  because my fiance wanted to "check" on the contractor.  We pulled up to her house and he got around to the back yard before me because I stopped to say hello to our neice's daughter who happened to pull in the driveway the same time we did.  After a few good words and hugs, my grand niece and I went to the back yard to see the job in progress and there was my fiance with a big smile on his face and speaking every now and then to the workers and the owner of the business.  All at once one of the workers was doing something on the job that my fiance didn't like.  He yells......"YO!  NO!  STOP!"  He continues to yell orders......don't do this, don't do that and he picks up one of their tools and HE starts working!!!!    Now everyone is staring at us like we have 3 heads but we just let my guy do his thing and after about 15 minutes of this we all walk away.  My grandniece goes in the house and my fiance and I go out to lunch.  As we are sitting having lunch I asked him..."So, how did you introduce yourself to the contractor?"  He said......"I didn't".    I shouted....."WHAT"? "You walked on the job, told them what to do and what not to do and you never told anyone you were the homeowners Uncle????!!!!!  OMG!!!!!!   He saw absolutley nothing wrong with what he did.  He said, "When someone walks up to a jobsite and takes charge like I did, they KNOW I'm the BOSS!!!!"    HELLO?   In what country?   No wonder they all looked at us like who the hell are you people!!!!!!     This is my life with my fiance, trying desperatly for the next 30 minutes to explain this is not appropriate while he spends the next 30 minutes trying to explain to me why it IS appropriate!!!!   You be the judge!!!