"but I want you to know I mean what I said about not wanting you to have sex with other people."
First off, don't ever say "but". It negates everything that precedes it.
Second, it again makes you sound needy and controlling. Just say that "I feel hurt when you sleep around with other men while we are still married. I don't feel it is an appropriate behavior to show our kids." Then if she tells you to go to hell, then you do the bag packing things. You're not stopping her, but she has to understand the consequences of her actions.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.