What must i do? She tucked up! This is the hardest descision of my life.

[redbull101]

I'am or was engaged to my fiance until recently I found some facebook messages she had with another guy about missing each other and when he gets back someone is gonna have to pry her off him, its going to be like there first time, cant wait to try new stuff she says,he says he is horny he ask her to send him a video of herself she says she has got to wait until I'am sleep. So i confront her and she denies and says she was jus starting conversation same time last year I almost left her cause she was talking to this very same guy exsesivley it was the worst Xmas, b-day, new year and anniversery. so rescently I finally get her to confess she slept with hime before we dated and she cheated on me with him right after her bday in Dec, her and my step daughter my son and her GF went to her mothers three states over the day after her bday left from there for a hour or two and met him at a hotel and had sex then after that a couple days later came back from her mothers, it was my sons first christmas then my b-day then new years which is our anniversery. So I ask why cheat she says we felt like roomates, that i was unssure of planning the wedding, and that we argued alot which was all BS cause I gave her everything I work she is a stay at home mom then she said she lost sight of us and beging me to stay cause I told her if she told me the truth I wouldnt leave her, she is saying I can have other relationships and can cheat as many times as I want too and she will do what ever it takes to make it work, the guy was someone she went to school with and is in the military and is married and just has there third child and me and his wife are now secreatly talking about the situation and he is now overseas and dont know nothing about whats going on. What do I do? My life is falling apart!!! my son is ill and in the hospital in another city all the trips have me broke and behind in bills from missing work, we are still living together but I cant stand to look at her one min I'am fine the next I'am hitting rock bottom, I tried telling her to leave and did'nt follow threw she is manipulative and uses sex to try making things right but I told her it makes things worse. Answers PLEASE

[wilsonx]

You kick her out and stop sleeping with her