There are many stories like this; there are even cases where someone got convicted of child pornography for sending nudes of themselves to their {boy,girl}friend.
It's bonkers. But it happens. Unfortunately all of this has become something of a taboo, but teenagers having sex is ... kind of normal. What exactly is and isn't acceptable is very hard to decide as a general matter, and far too often any conversation is shot down with "pedophile apologist!" or, in this case, baseless "you must have done something wrong!" assumptions.
It's bonkers. But it happens. Unfortunately all of this has become something of a taboo, but teenagers having sex is ... kind of normal. What exactly is and isn't acceptable is very hard to decide as a general matter, and far too often any conversation is shot down with "pedophile apologist!" or, in this case, baseless "you must have done something wrong!" assumptions.