My Wife's Sexual Awakening

Many years ago my wife once confessed to having a fantasy about having sex with a black guy.
We've now been married 30 plus years with grown up kids. From time to time I would tease her about it usually during sex . At times I've seen a different side of her triggered I think mainly by something she's read making her super horny . At those time we don't make we fuck or she fucks me more to the point.
4 years ago a locum at the hospital she works at arrived and no accommodation was sorted for him ,she calls me asking if it's OK if we put him up for a few days till a place is available. She said he's from England and seems a nice guy. I said no problem. That night I was somewhat surprised when she gets home with this 6 ft plus guy who's very dark skinned. Didn't bother me in the least just not what I was expecting from an English Dr. Turns out his parents were from Somalia but he was born and educated in London.
He turned out to be a nice guy as she first thought with a interest in fishing like me. After a day or two I suggested he stay with us for the few months he was working here and I'd take him fishing. I noticed my wife's raised libido after a week or so and after a very intense sex session I asked her if it was me she was thinking about or Simon the Dr . She instantly went red and denied it but later did say yes she was but it was only in her head.
I said that maybe she should make her fantasy come to life and also find out what sex was like with another guy as she'd only ever been with me.
She laughed it off and dismissed the idea or so it seemed. But her desire for sex far more often than normal lead me to believe she still had it on her mind.
I work nights on a regular roster so it ment 3 nights in 9 they had dinner together. I joked one night as I was leaving that all they needed was candles for a romantic dinner, Simon joked he was waiting for me to leave before they came out. I winked at my wife and said I hope you have your sexy underwear on.
Long story short 3 weeks later she was in his bed. She said it wasn't like she expected in some ways but the skin color contrast did drive her wild. She told me he his cock was only a bit longer than me and thicker too. But the big difference was his overall size and strength. He is much taller than me and 40kg heavier than me. She shared his bed on the 3 nights I worked and I never missed out when I was home either ,usually a couple of nights after she had slept with him.
Big change over that 6 months was she would instigate sex as much as I did. I know people will think I'm weird or a cuck or something but I've always thought love and lust are not necessarily exclusive to each other.
I was happy to she her bloom in more ways than just sex. She was more confident in herself and also lost a little weight and got fitter , improving her ass among other things.
One night she even got out of our bed and went downstairs and fucked him after we had done it and I'd gone to sleep. Simon told me weeks later about it . One morning I came downstairs after working the last night of a set of shifts about 8 am she wasn't in our bed and Simon's door was a little open and I'd seen then sleeping when I'd come home much earlier than normal around midnight.
Next morning I was up earlyish intent on going fishing. I didn't realize they weren't working that day.
It was obvious what was going on when I came downstairs. I'd never seen him kiss her other than on the cheek before and couldn't resist taking a peek . She was on top with his hand firmly pulling her ass down with stroke and I was just mesmerized as I'd always been curious. After a few minutes I heard her moan to him , be rough with me.. He flipped her over in what seemed a practiced moved and mounted her doggystyle . Then proceeded the pound her till she announced , you are gonna cum I can feel it. She dropped her shoulders lower and rocked her hips back to take him as deep as possible.
I left them to it and few days later I mentioned to Simon that I'd see and heard them. He was a bit embarrassed and said sorry . I laughed and said , it's not like I didn't know you were fucking my wife. Was a good moment and we talked more about the whole thing.
I said I'd felt it had changed her and I always thought she was mostly holding back a bit during sex but occasionally I'd seen the other her and she was wild in bed but it didn't last more than a few days.
He said he'd seen the change too but put it down to her being more comfortable with him and our situation.
He told me about her coming downstairs that night after having sex with me and she'd dropped her robe and jumped naked into bed and got busy making him hard. I asked if she did that thing with her hip to take him deeper and he nodded saying it was the first time he'd seen her do that. She told him after she loved it when he was hitting her cervix and could feel him cum then. He said she had the longest most intense orgasm he'd seen up till that point. He said that what I saw that morning would have the same result but with a longer orgasm.
It all ended when Simon returned home but it's made a huge difference to my wife.. She admits she really likes him but it was more about discovering who she was and learning to enjoy the pleasure of sex and sometimes just wanting to fuck is good for you.
She did tell me that first night she came just watching his black cock disappear in her. And how different it was being with a bigger stronger man even those he was a gentle considerate lover until she convinced him to fuck her roughly at times . She said maybe she is weird but she sometimes got off on feeling that he could do anything to her and she couldn't stop him. She surprised me more saying he took her anal cherry too ,Ive since discovered that it makes her cum hard that way.
5 years later we are cruising along nicely and still have a great sex life.