When DS moved in, we met the girl and 2 boys and as it's a 5 person flat, I said that the last person must also be a girl but it was another male.
I was a bit surprised too. Maybe not many girls have said they are happy to have mixed? All their room doors lock and they do have 2 toilets, he said they are trying to keep it one male and one female (some of their visitors are also female
but obviously not always possible and the shower is shared but also has a locking door.
DS2 is a good soul though, DS1 is struggling a bit with his mental health and just not going out the house apart from to uni and back or with us. he took him out for a pint or two when he was back and they also went for lunch on the way to the train home and DS1 has now told me that DS2 invited him to come up for a weekend and go out with him and his friends (and kip on his floor). Honestly, sometimes my heart just gets too many feels...
Sorry to hear about the hard time you and DH are having SchrodingersKitty I hope you get some resolution soon.