I was going to dump my wife but my brother in law saved our relationship. She doesnt know and may never know

My wife and I met when we were teens, I had just come off of two very bad situations with girls who I thought were my girlfriends but I was just their side guy. So when I met my wife I was raw, not very trusting, but absolutely inlove with her. She had a bunch of guy friends who were also obsessed with her. The worst being a guy named Bradly. I told her I didnt like him, didnt want to be in a relationship with so many other men hanginging around, she begged me to be understanding, and i tried. One night she is doing something and I am alone with Bradly and my now brother in law in their parents kitchen. Bradly tries the whole alpha dog "ive known her longer and if you hurt her" shit on me. I was already raging at even seeing him cause we had had an arguement about him earlier that day. Some shit was said, BIL just watched quietly, Bradly implied something about my wife that just made me snap. I backhanded him and said I was fucking done with this shit and left. We had been dating about 9 months by then and I had reached my limit of all the guys in her life trying to get with her or fuck with me or both. I planned on breaking up with her that day or the next whenever I cooled off. She found me early that next morning and started apologising and crying nonstop. Apparently my BIL told her everything and gave her a "harsh lecture" about her choice in friends. That seemed to finally get through to her and left me feeling like a shitheel for makinf her cry. I changed my mind on ending the relationship after we spent hours talking. Been together 16 years, married 11. But I came so close to losing something that has been so perfect because I was young and didnt know how to handle it. My BIL saved my relationship with my wife. Quiet guy, doesnt speak up often, but is the only reason I am with her today.