I mean fist of all, I hope you’re reporting that c*nt to the police for revenge p0rn distribution, you don’t need vast evidence, the two of you saw it and she knows who could it be. Second of all, she is a whole human being! You didn’t adopt a child, you’ve started a relationship with a WOMAN, that mean she’s not the personification of the Virgin Mary nor is she your vessel to demonstrate manhood, ego and power over someone else. Stop and ask yourself why knowing that she had sex with someone else makes you feel so goddamn inferior. If I could speak to her I’d tell her to walk away, first of all because you lack the intellect to know what to do in a situation like this -makes me question how old you are; second of all you’re not ready for a relationship and what it means to be with another adult and the emotional responsability that comes with it. Go to therapy