Break Up & Divorce

Am I the a-hole if I chose not to father a kid that isn't biologically mine? Would I also be considered unmanly for not helping my ex financially?

To make the long story short, it was on early February of this year when she cheated with 2 other guys behind my back. When I confronted her regarding this she kept claiming that we we're already broken up before she did what she did, also stating that she did what she did because she saw no future on my job (I currently work in the oil rigs), and she couldn't stand being with a "blue collared bum" any longer.

After being hurt, I immediately cut them off as I couldn't bear how she was gaslighting me all along, because I know to myself that I work hard enough just to provide for both of us. Months later, her siblings reached out to me telling me that my ex is pregnant also claiming that I could be the potential father of the kid. As I reached out to her she told me that I'm the biological parent of this kid. She even bragged about saying that I am the last person she wants to talk to, but I'm the only guy who can help her out so she was asking for money in order to provide child support for this baby.

Deep inside me, I was still filled with anger and grudges the way she cheated and gaslit me, but for the sake of the child I told her that I'll take at least 3 DNA tests to confirm if I'm the biological father of this kid. Fortunately, it turns out that the results we're all negative. After showing her the results, she immediately threatened me that if I don't help her, we would have "problems". I wasn't bothered by it in the first place because I thought that she was just bluffing.

But weeks later, her threats actually happened. She started outing me on social media claiming that I'm not a "real man" for choosing not to take responsibility of the kid and once again assuming that I am the father, when in-fact I already took 3 DNA tests just to prove otherwise. And ever since she exposed me on all other social media platforms, people have started cyberbullying me and threatening to beat me up for refusing to become a father of a kid that's not even mine to begin with.

Am I the a-hole if I chose not to father a kid that isn't biologically mine? Would I also be considered unmanly for not helping my ex financially?
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