<human>: Can you condense the text into three sentences or less?

My 25 year old son has a job which means he does 12 hour nightshifts 3-4 times a week, including weekends. After his nightshifts, he comes to my house an sleeps in the spare bedroom. He sleeps in my house because he says at his own house, it's too noisy. 

In his own house, he has his partner, who is mostly home during weekdays as she only works weekends. They then have a one year old, then his partner has a 14 year old girl who - if it's the weekends or after school, always has at least 2 friends with her. It's the group of girls who are the noisiest. So the house is very noisy. 

I don't have a problem with my son sleeping in my spare room, but I think as his mother I should try and encourage him to have a better arrangement set up in his own home so he can sleep there, for his sake. For example, if the 14 year old does have friends over, she could only have them downstairs, and they'd not be allowed upstairs when my son is sleeping. My son's partner says since the 14 year old's bedroom is upstairs she doesnt think she could tell her daughter and her friends they couldnt come upstairs.
<bot>: Am I wrong to think it's a bit unconventional that my son sleeps at my house? Or since I don't mind, should I just put up with it and help him out?