Looking for our first bull or mfm

We struggled at first. We decided to enlist a friend which did not work out, he got 3 blowjobs but wife got nothing, it was a mistake. We looked at dating sites and it seemed awkard although as part of a challenge we are doing she currently has a dating profile in order to flirt with men and she has had a lot of interaction. My wife just decided to go out out one night and see who would hit on her. It worked out, a much younger man hit on her and she started seeing him. That was months ago. We see him as a couple for MFM several times a month and she sees him solo, in fact lately quite a bit. It has been good for us as the 3 of us are only having sex within this arrangement, we have all been tested and so no condoms.