How to keep love-struck teens apart?

[pliableble]

DS (16) has been with his girlfriend for a couple of years so she's almost part of the family. I've suggested they just meet in the park but they're still ending up back at her house most of the time. He says her mum doesn't mind. (We've never met, and I don't have her contact details so I can't easily check with her).

Anyone else struggling with similar?

I know people will say ban him for seeing her - but he’s 16. I would maybe say he can see her at yours but not elsewhere so he’s only exposed to her and not her wider family.

they've got facetime or whatever. And that will stop some other risks too.

not in the same house? No contact unless essential, and unless really essential you stay 2 metres apart. Yeah, right...