My 17yo nephew came to us at the start of the summer due to difficulties with my sister's partner. We have my 16yo DS 24/7 and shared care my partners children, 13 and 11. He's started 6th form and his school have said he's mostly doing well. He worked the whole summer and bought himself a motorbike. He's constantly out on the bike, meeting up with friends and has just arrived home having stayed out overnight (he asked permission) covered in lovebites. He's admitted he 'hooked up' with his friends sister.
This is so totally outside our parenting experience, my DS is a homebody and loves a book and has never given me a moment of worry. The others are young enough that they don't go out much independently. What is ok? What is normal for this age?