Women of Reddit, what is the worst thing a female friend has done to a man, did you speak up about it?

So fucked up. Before we got together, my SO had a rocky on/off relationship with his ex gf. She got pregnant and decided to get an abortion. SO felt so terrible about it. He later found out that she cheated on him when he saw her phone. Turns out she had a std and was texting about it with the guy she cheated with. This led to finding out that this guy was the one who got her pregnant and he paid for the abortion. Sad part was this wasn't the only time she had cheated on him. It took him a lonnng time to get through. Our relationship at the beginning was tough too because he just couldn't trust anybody after going through all of that, understandably.

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