AITA for telling my ex-girlfriend I won’t help her until we do a DNA test?

Four months ago, I (25M) and Emma (23F) ended our two-year relationship with a friendly goodbye, promising to stay in touch. Then, two weeks back, she called, voice shaking: she’s three months pregnant and says it’s mine. She wants us back together, raising a family. I’m stunned—we used protection, haven’t been together since the split—but the timing fits. I asked for a DNA test before committing, and now she’s furious, rallying friends to call me a jerk for doubting her. Did I mess up?

Breakups leave echoes, and this one’s ringing loud. Emma’s hurt, clinging to a story I can’t fully buy—not without proof. Dr. Shirley Glass, a relationships sage, once wrote, “Trust is a bridge rebuilt with facts, not feelings” (from Not Just Friends). I’m not calling her a liar; I’m just lost in the fog of “what if.” We used protection—religiously—so her certainty feels like a leap. Meanwhile, she’s pushing for a redo of us, and I’m wondering if this is less about a baby and more about a second chance she wants me to take blind.

She sees betrayal in my doubt; I see caution in a life-altering claim. The clash? Her heart’s screaming “believe me,” while my head’s whispering “be sure.” Stats say 1 in 25 paternity claims turn out wrong (American Pregnancy Association, 2023), and that’s enough to pause.

Her rallying the troops—friends, family—feels like a play to corner me, and it’s working. Some get my side; others see a cold skeptic. Solution? A prenatal DNA test—safe, pricey (up to $2,000), but a lifeline to clarity. I’d pay, I’d support emotionally, but I won’t dive in blind. Readers, is this paranoia or prudence?

Reddit’s crowd weighed in with a mix of fire and reason. Most lean toward “not the asshole,” arguing a DNA test is a fair ask when an ex drops a bombshell like this—especially post-breakup with no recent intimacy. They see Emma’s pushback and guilt trips as red flags, hinting she might be leveraging emotion over evidence. A few sympathize with her hurt but still back the test, saying trust isn’t the issue—certainty is. Overall, they urge standing firm: if it’s yours, step up; if not, don’t get trapped.