My wife left for her bbc addiction

I found out my wife was having an affair for over 2 years. I had my suspicions but never found any evidence. Just hearsay, someone caught her and her lover in their office (she works in education), I’ve heard neighbors complain about noises and seeing “strange” black men coming in. Every time I brought it up she dismissed it. I got home a little early one day saw her in stockings and lingerie thrown about, she was sweaty and the bedsheets were soaked and a complete mess, she was still out of breath, she looked panicked and out of the restroom came a really muscular naked black man with what looked like the largest cock I’ve ever seen. I was hurt and angry, she tried to explain but I just left. I come back about a day later and we talk she said it was a lapse in judgment and it wouldn’t happen again. It did she kept seeing him, found out through texts and iCloud. I didn’t say anything, I couldn’t stop thinking about her taking that massive bbc and what that must’ve looked like. Without telling her I started to support her cheating by telling her my whereabouts and time I’d get home always allowing for extra time. I’d get home and would see in her eyes that she’d just been satisfied in ways I couldn’t. We started having a lot more sex and on occasion she’d slip his name out which turned me on more and she could sense it. I finally worked up the nerve to tell her and she agreed to let me watch, it was magical. Her lover had a cock 3x bigger and fatter than mine. She did things I’d never seen or experienced with her. He loved to humiliate me and talk trash to me about how much she loved black dick, and he would tell her to say these things to me. Eventually she did it on her own and made me wear condoms then no sex just handjobs and blowjobs but no cumming in or on her. Then a cage. Then she got pregnant we had multiple gatherings to celebrate then she broke the news it was his baby (already several months pregnant). I said that was fine but She must’ve gotten over it and bored with me she separated from me and moved in with him. They have a beautiful baby but we’re still technically married. And now I’m trying to get her back