Why do some women have to be so petty?

So about a year and a half ago my fiancé (my husband now) and I started trying to have a baby. Well we had really good sex one night and the next day while I was at work I got a text from him saying call me ASAP! So I called him when I went outside and he said he accidentally sent a sexual text to the wrong person. Well that wrong person was his old friend let’s call her KD.

I had meet her many times and I really liked her she was super nice and her daughter was so cute and she was engaged. Adam didn’t find her attractive at all. I’m not really a jealous type. So I wasn’t worried. But anyway she has messaged me with a screenshot of the message, saying he was a piece of trash and I needed to leave him. I told her it was just a mistake and Adam already told me about it.

Well she then proceeded to send the photos to her fiancé who messaged me about it and threatened to kick my fiancé’s ass. Told them I knew what happened and it was mistake again. And I blocked him because he wouldn’t leave me alone. Then I got a message from my fiancé’s old GF saying that what he did was fucked up and I need to leave him. I told her to mind her own business and worry about herself. She then took a screenshot of our messages and blasted me all Facebook and Instagram saying I was a dumb bitch for staying with a cheating man🙄

I wasn’t worried about what they were trying to start because he had called me and told me what had happened as soon as he noticed what happened he even showed me the message he sent after it saying “I didn’t mean to send that you” delete it or just ignore it.

But anyway we haven’t spoken to DK for over a year and a half since that happened because we are adults and don’t need drama in our lives. But anyway I started a new part time on top of my full time job to save up money so we can buy the house we’re currently renting. Turns out I work with DK’s little sister and her sister told me that DK told her to be mean to me because she doesn’t like me..... but her sister said she wasn’t going to do that because that would be mean.

I am just so annoyed that after almost 2 years she still is trying to start up petty shit that she did the first go around🙄 why do some woman have to be so so petty!?