How do your sims react to being unfaithful?

I haven't played much sims 4 so I haven't yet experienced this, but recently in sims 3 I created a game where I made people that I know in real life and put them into my world. My female sim (not me) saw another sim I had made (random sim, I just thought she was pretty) so I tried to get them together. Come to find out, she was dating one of my irl friends. Long story short, they started dating anyway and I stalked the boyfriend to get him on her relationship bar so that I could throw a party with them all together so he'd see them with each other. Turns out I didn't need to because Miranda (the girlfriend) threw a halloween party and they were both there. I had them make out in front of him and he got all mad and they broke up and after he left they woohoo'd. Now he's engaged to some random ugly sim. All this time I'm documenting what's happening and sending it to my friend who calls me a jerk and slams Miranda ahhaha. Then he requests I "make cooler." While all of this is happening some other of my friend sims are going through funny shit as well. I love that save.

Unrelated: I can't see any of the pictures on this thread. This is what I see:
https://i.gyazo.com/1b7ea31432d74e0409d767f9db122b25.png