Help solve a disagreement between me and DH. DH's brother is coming to stay with us overnight one day this week - he is mainly staying with us because we live somewhere that's convenient for the airport, but there is an element of coming to see us because he lives a long way away so we only see him a few times a year so this is a handy 'kills two birds with one stone' scenario. He will also be staying with us for the night when he returns in a few weeks time.
Just for context we all get on well but aren't close (that includes DH and his brother - no falling out, just not that close). The issue is that I want him to leave in the morning when we leave for work - at around 8.30am. DH feels that this is rude and we should let him stay in the flat for the day until he needs to leave for the airport. DH's brother would do whatever we asked him to.
My practical opposition is around double locking the door - but we could solve this by giving him a set of spare keys and him dropping them through the letter box of my sister's who lives a 5 minute walk away. My main reason though is that I just feel really uncomfortable with the idea of someone being in my flat when I'm not there. The flat is very small so it's not as though he'd just be hanging out downstairs like you would in a house. Our bedroom for example is a complete mess at the moment (and no time to tidy it before he comes) and I'd hate for him to have a nose and see it! If he left with us he would be able to go to various local cafes for a few hours, or has to go into central London to get the train to the airport anyway so could find stuff to do there etc. I get that it could be inconvenient though.
This may cause issues the next time he stays as well as that time I will be working from home, but I work in our sitting room and would find it really distracting to have him around during the day - as it's a one bed flat the only other place for him to go would be the tiny kitchen.
So, AIBU in not wanting him to stay in the flat after we've left for work?