Am I unreasonable to limit my 16-year-old son's girlfriend staying over?

[BySillyHiker]

My 16 year old son has been dating a girl for the last 3 months, since he has finished school and now doing exams he had her staying over most nights we are now on the 6th night in a row. Ive said to him nicely you can't have her over every night. Plus he is doing exams and staying up late till 1am. I feel like I have no space in the house. feeding an extra person feels like I have an extra person living in the house, im doing all the pick ups and drop offs. already trying to manage the house with 3 younger children. My partner is at work all day till 7pm and says im being miserable about it.
I think my son is planning on having her over every night as they cant seem to be apart from each other. Im starting to feel stressed buy it all as have no privacy.

Absolutely not. Especially during exams. Once a week at most.

when I started dating DH we were in our early twenties in a LDR. I stayed over two nights every two weeks (officially in separate bedrooms, but not really lol)

Exactly this, thank you ..... I just get nervous on Mumsnet.
It can be 'difficult' - & yes, absolutely, we must all do what's right for our own kids, but equally we must expect different opinions if we ask for same on a public platform 🤷‍♀️

Why doesn’t he stay at hers some of the time? She’s effectively moved in! No way is this acceptable and your son knows it!

Personally I wouldn't involve her parents, I'd tell my son if she was coming over during mealtime and/or she wishes to stay the night, he must ASK. No ask, then tell her to leave as soon as mealtime arrives as the family is sitting down to dinner and so she must leave. Also tell her to leave around 9pm or so as she isn't staying over as your son didn't ask in advance. They are not being reasonable and she is imposing so you need to get a bit direct.
And any sleepovers whilst he has exams on would be denied.
As for mum, do you tell her how to do her job? You are the one dealing with dinner (presumably) and I would tell her to either get herself back home in time to deal with everything herself or leave me to it.