Something about Kayla always irked me, but I let it go until she started talking badly about me in front of people.
She was married to an amazing man, Dave. He was way out of her league, and I often wondered how she managed to land such a good guy. I couldn't allow her insults go unchecked. I had to get revenge.
Sleeping with her husband was, in my eyes, the most sinister, evil thing that a "friend" could do to another "friend."
I wanted to dominate and humiliate her while I turned her life upside down.