If you were shocked and appalled by the paternity-test-slash-statutory-rape drama surrounding Justin Bieber, we're here to tell you it might just be worse than you thought. Isn't it always?

The 20-year-old woman claiming to have given birth to Justin's first son is talking and everyone's listening now ... while simultaneously digging into her past to see if she has a pattern of getting knocked up and accusing tween pop stars, we're sure.

Mariah Yeater (the mom) did an interview with The Insider and says she's not at all worried about the paternity test Justin says he'll take to prove her son, Tristyn, isn't his. She says she has proof Justin is the father, and her attorney will be presenting the evidence to the court.

Yeater says she was introduced to Justin at the Staples Center in Los Angeles where he asked her if they could be alone. From there, he led her to the bathroom and started out being all “cute and gushy,” and then got really aggressive, so Yeater gave in. She says it took Justin all of thirty seconds to lose his virginity and get her pregnant.

Poor kid! Not even legal yet and already getting the two-pump-chump brush off.

Of course the Bieber camp says Yeater is lying, and Justin was with security all night. Gotta protect Justin's honor, you know.

But don't worry, Justin! The New York Post has your back with some reasons that kid couldn't possibly be yours.

From the Post:

Why the baby couldn't be Justin's

1. Genetics: the baby is ALREADY bigger than Bieber.
2. Puberty: Justin hasn’t gone through it yet.
3. Nationality: The baby cannot say “eh,” which every true Canadian can say at birth.
4. Philosophy: Justin is smart enough to say: Baby, baby, baby, no!
5. Reality: No one ever feels like having sex after a Justin Bieber concert.