Why are some of you blaming the boy exclusively?
It's his life and he can have sex with whomever he pleases (although it is quite odd that a fourteen year old would want to be fooling around with a 33-year-old). But if he felt that he was mature enough to be having sex, then it is not your place to say he wasn't. However, meeting someone on a dating app, especially someone so much older, is never a good idea.
This is clearly the **** star's fault too, though. Not using a condom and not disclosing your status prior to having intercourse is irresponsible and foolish.