Wife said she touched a BBC during our vacation. [F29] [M27] (Need advice)

My Wife & i are both in our early twenties and both latinos, from illinois. She was my first and i was her first, and we've been together ever since highschool.. this all started when the wife and i went on a road trip to Tenesee. On our way there we made a few stops. On the 2nd stop there we stopped at an oasis to use the restroom and buy some snacks, it was starting to get dark out so there was only one or two other cars there and some trucks staying over night in the parking lot too. we both agreed we would meet back up at the car when we were done using the restroom. I took about 20 mins (scrolling, mostly) and when i went back to the car, she told me that when she went to go get snacks from the vending machine there was this really tall black dude standing next to the machine. She said that while she was getting her snacks he whipped out his cock and started talking to her, like having normal conversation. And she told me he started jerking off and she was suprised and just stood there. He ended up blowing his load all over her leg and shorts. I was pissed initally as to why she didnt call me or say anything. Until i got back to the car. I even went to look for the guy after because i was really upset. Anyways we get to the hotel that night amd she still had some cum stains on her shorts ect, And she showers comes out, im just watching tv, and she just comes straight out and pulls my dick out amd starts sucking my dick. She had never done that before the entirety of our relationship so i was a little taken aback. She starts telling me in between deep throating me if i want to know something, i said "what baby" she said i loved his big black cock. At first i didnt know what to say, i kinda said huh? But she kept sucking and i was so horny, that i just let it slide. Then she kept going and said that his dick was so thick and had veins popping out, i asked him if i could touch it and i did. I made him cum on my leg, because i was so horny seeing it. But now i want it inside me, i have his number.. After she says that she deep throats my dick so good that i was just so turned on i didnt care what she said & i came in her mouth. Thats the story

the next part is for all of you couples on here, I brought it up recently and she feels guilty about it. And said she changed her mind. The problem is that now i really want to see her fucking a really big dick. Not sure how to bring her back to it or convince her?