So, a little background information. I bought my house when I was single and own it solely. My partner moved in with me earlier this year but hasn't been added to the mortgage, house deeds etc. We are planning on getting married but nothing arranged yet.
Last week I noticed that there was a leak and as my OH's dad was popping round asked him to have a quick look to see whether he could figure out the problem. He couldn't. I have since discovered the problem and confirmed to him what it was, and its an easy fix that I said I could do myself.
However, he went to my OH and got his house key from him, let himself into my house and then told my OH he was going to get himself a key cut 'for future purposes' all without my knowledge.
I'm upset and angry and don't see why he needs a key? I'm also frustrated that all of this happened without my agreement? AIBU??