It is true. Blame people that use it wrong and laws that blurr biologic developement and laws.
Because with law you needed to be 21 to be adult in the sense of booze, porn and stuff.
So the meaning of Teenager is sometimes stretched to 21. And in porn industry actresses that are 24 will be classified or hired as teenagers too.
If you go by biology and dictionary it just means early 13 to late 19. But if you go by law or logic (because when you are born you are 0 years old and need to fullfill 20 years old to get past being in the tenth) it can stretches to the rim of 20-21.
And if you ask some puritans, tricky porn directors or scientists ( telegraph.co.uk/science/2018/01/19/adulthood-now-begins-24-say-scientists-young-people-delay-work/
) it can mean including to 24.>>105932212
She at least 13 or 19?