Heartbroken and lost

Hello, I'm new to this forum. Got a great story. I've been married for 30+ yrs.and my wife and i wanted to spice up our sex life abit so we talk about a third partner in our sex life. She wanted a female so i agree too. So we asked ourselves... who???

Well back in 09' an old girl friend will call her "C" that I knew in high school reach out to me in an high school website, and we started talking and catching up. We been txt and talking for a few months, all this time my wife knew about our conversations. So I asked my wife one night..
what do you think about her?

My wife said ok jus bc we all knew each other. But she lived in another state. But bad luck fell on her and she had nothing to hold her there. So I call "C" and told her to move back home. So she did and she reconcile with her mom and daughter. Re-establish her life, work,apartment, money

All three of us went out to dinner. I told my wife that I was going to ask her if she was interested in being out third partner. So during dinner I popped the question. She was shocked but with a big grin. And said YES. So we went cruising around and we back to our high school for memory lane.

We got out walk around the parking lot, and my wife kissed me in front of her. "C" stood beside my wife and I and said, I'll be everything I need to be that you what me to be. Then I kissed her, after the kiss I looked at my wife said let's take this home. So we got home and my wife and I hade the most exciting night. OMG!!!!. And my wife found a besty a girly girl. They shared the same likes

Well this lasted for 3yrs. I tried soooo hard to hold on to what my wife and I thought of our love for her. But found out she wasn't faithful. I was heart broken but more my wife. Mind you we exchange rings and faithful vows to each other. I told her she can go out with her friends etc.. but as long she let's me know when she home. Just to safe and she's ok, but one night, she went out and didn't come to the apartment till next morning.

She gave me an excuse that she was called to work, late night but when I saw here that morning she was wearing old shorts and a tank top plus a overnight bag. I called and txt her several times Tru the night and never answered. My wife knew something fishy, womens in to wishing. She's cheating on us. Bc she contacted my wife a few times in the past about me or her, that we're running late or etc.. But my wife was right.

There were time early in our relationship my wife would tell "C" if this is not for you just be friends and it's ok, but she agreed and swearing this is what she wanted. But that ole saying..nothing last for ever. And it didn't
So in 2012 it was over, I went thru bad heartache and anger but I hid it from my wife. Found out months later "C" got married and moved out of town. My wife and I were shocked. My wife says that the guy she cheated on us.

This is part 1 of this story there more to this in part 2.
Thanks Samcro67