OLW ~ While she is on her camping trip with OM and your children, move back into your home. Move. Back. Into. Your. Home. If she wants to leave the M, start a relationship with another man, she can do it on her somewhere else on her own dime. She has such little respect for you - taking YOUR children on an overnight jaunt with her boyfriend. As a woman, I can tell you that if my H rolled over like that with my infidelity in full view, I'd have zero respect for him as a man. And if a woman doesn't respect a man, she cannot love him.
Move home. When she comes home, OLW to W: "I have decided that I will not live in or enable you to have an open marriage. You will not drag our children through your affair. If you are going to live in this house with me and our children, you must end the affair now. If you are not willing to do that, please have your things moved out into a place of your own by the end of the week. I will begin interviewing lawyers in the morning."
Then you stand by that.
Greek
Me45 H46 T25 M22 S21 & 19 D13 Separated and filed 8/08 Moved home 11/08