Haddie Having Sex

It's so laughable at how shaken to the core/angry/disappointed Adam and Kristina (Adam in particular) are at Haddie having sex with Alex. Haddie made a choice she was comfortable with. Apart from Alex being 19, which I think is problematic and kinda gross for a 16 year old, it is completely normal and healthy.
Adam gets so caveman about this stuff. Young people, even girls, are entitled to choose what they want to do with their bodies and choose when they take that step.
So cringe and backwards.