So Glad My Girlfriend Convinced Me

My girlfiend and I have been together for 10 years, 3 years into it it became officially open but only on my part. Before I had cheated on her, she always assumed and of course I would deny. I didn't sleep with other women cause I didn't love her, I loved her more then I ever loved anyone.for atleast 2 years she kept telling me as long as I was honest she didn't have a problem with me sleeping with other women.. I thought it was a trap so I never allowed myself to be open to her about it. Until one night we were at a bar we liked to go to, when she said to me that a girl we knew from going there, wanted me...SO? I said. So she told this woman it was fine with her to have sex with me. After a few more hours and a few more drinks I took this woman to a hotel.. to prove 2 things 1 my girlfriend couldn't handle this and 2 this woman kept telling me how incredible she was and I was gonna shut her up.I think the fact that I didn't want to have sex with her allowed me to agree. Well both things didn't happen my girlfriend was fine and this woman was incredible. The next day I told my girlfriend we had sex and went to sleep she never asked details, even in future times she didn't ask. However the woman told her we had sex for 5 straight hours. Which was the truth. After that sex with other people wasn't sneaky or rushed or tied to guilt. 6 months later I was with someone that my girl hadn't arranged. This girl I had wanted for a while but she had a boyfriend. The minute they broke up I invited her to come party at a hotel and she was all for it. I got the room Fri but didn't get home till Monday morning. Once again my girlfriend wasn't mad nor did. She grill me about it. She did say one thing that has stuck with me..isn't it amazing how incredible it can be when your not worried about anything?she was the incredible one and she was so right too.I continued seeing that girl for 3 or 4 months. The next woman I met was when I was on vacation with my girlfriend. Another incredible experience