How, and more importantly why, are you reading her texts? You've already verified she's unfaithful. Any reason to subject yourself to this? I think it's probably bleeding over into other parts of your life. I hope you change your focus onto your life, work, kids.
Exactly what I was going to say. Curtis, you know the situation. Quit snooping. Leave her to the mess she's making and focus on you. She's straight out of a Girls Gone Wild movie. It's not going to change anytime soon, she has to fall and fall hard.