Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: So, first of all, obvious throwaway. Secondly, I'm on mobile, so excuse any formatting errors.

Bit of a background, I've decided a few years back, after a major pregnancy scare, that I'm not gonna leave something like this to chance, and I've got a vasectomy.

Fast forward 5 years, I'm in a relationship with this girl, our 1 year anniversary is coming up, and she decides to spring up on me, that she is pregnant. To this day, I'm amazed that I've kept my calm. I'm not going to lie here, I'm not a saint, in fact, I'm a pretty vindictive person. My first course of action was asking if she considered an abortion. After her stating, that having a child was one of her top priorities, the case was pretty much clear to me.

The whole gist of the matter, in my country, abortions are allowed until 16 weeks in. So I've waited, and bid my time to strike. I've waited the whole 16 weeks to make sure, then confronted her with the following: either we get a paternity test, or she fucks off immediately. Now I know that even a vasectomy isn't 100% safe, so I was fully prepared to take responsibility if the child was actually mine. Well, seems like I'm never going to know, as she vehemently refused testing, and broke down crying after me kicking her out.

TL;DR Girlfriend cheated on me, got pregnant, I've tricked her into believing that I belive it's mine until she couldn't abort anymore, then unceremoniously kicked her out and cut contact.

So, am I really the Asshole here?

waiting with telling my ex-girlfriend that the baby cannot be mine