Genuine first time partner sharing

Tried putting up a story but actually there is a word limit and I ran out, I’ll try and abbreviate this as best I can. Background I’m 65, in good shape, attractive, however the last three years I’ve developed and struggled with ED. My wife of 30 years is 50, he one previous boyfriend before me, is extremely attractive and exercises everyday, yes she looks fit me most people put her mid thirties, genuine. Neither of us are highly sexed, just normal, we average sex until my ED set on two or three times a week, it’s always been nice not exceptional, would consider our sex to be conventional vanilla with the odd kink thrown in. Since my ED our sex life understandably has deteriorated, orgasm for my wife comes in other forms now and not penetrative sex. About six months ago we watching some soft porn prior to sex as we mainly do, we ere browsing and I said to my wife just go to my favourites which we did, after a couple of minutes. Y wife says, why are all these videos the same, men fucking other wives and the husband watching, I said it’s cuckolding and I it turns me on. Fast forward that comment caused arguments that lasted weeks.
Fast forward to last month I took a business trip to London, took my wife as I normally do, it was my last trip before retirement. We stayed at the same hotel in Chelsea, it was a five day trip plus travel days.
The first night sex was a disaster, the Viagra didn’t do much and we eventually gave up in penetrative sex. The second night wasn’t much better, I got hard enough but it didn’t last so we stopped and reverted to watching some porn in the hope I would respond. As we watched my wife said how do you find guys like these, I sort of played dumb and said I think there are a couple of free websites, I heard of one called double list, it’s popular in Canada. Then to my surprise she said let’s go on and see, which we did, we have some fun reading the posts and just reading them got some reactions from me. Then again to my surprise she said let’s sign up and just for fun let’s make a post..crazy…we did that but me made a mistake, the post we made was too vague and we were inundated with literally hundreds of replies. We took the post off and tried again this time making the post specific to my wife’s most perfect and ideal male. We genuinely still got dozens of replies, we read most of them, then what I asked, my wife at first said it was just a bit of fun, we had sex, sort of, it was manly oral and toys though. The following morning at breakfast my said if you don’t think it will ruin our marriage let’s reply to a couple of those guys, I was a little shocked but a shiver of excitement went through me as well. That evening we replied to five guys, four responded, all the guys seemed on the surface to fit my wife’s ideal male. We talked again and my wife said yes we would proceed so we invited one guys over for the next evening, to cut a long story short he didn’t turn up, I could sense huge relief with my wife but also a sense of disappointment. That night we decided to try again after we chatted for a couple of hours about the feelings we had. We messaged two guys this time just before we went to bed that night, our last night in London was the next day. At breakfast we opened up the fake email we set up and both guys had responded. The send on guy was a backup and we explained that to him, he wasn’t particularly happy about it but he agreed. We had arranged to meet in the lobby bar with the first guy at 9pm. That evening my wife got ready, she was a bag of nerves to be honest, she wore some very expensive lingerie I had bought during the trip. 9pm came and went and no answer from our text, couldn’t believe it. We messaged the backup guy, he responded, however, he was an hour away and didn’t really expect a call. We told him we would wait. That was an incredibly long hour. Around 10.30 he showed, the bar was closing shortly, his description