<p>I think that what concerns me most about the situation the OP described is how the girlfriend involved the OP.</p>
<p>Reminds me a lot of an experience when I was in college when my boyfriend and I broke up, and my boyfriend called my mother to tell her that I’d cheated on him. My mother ripped into me including calling me some very nasty names, and the fallout from that affected our relationship for the rest of my mother’s life.</p>
<p>While I think it’s very appropriate for a parent to speak up if their adult offspring brings to them a concern about a relationship or if the parent stumbles upon some info that indicates a problem like cheating, I don’t think it’s appropriate for a parent to get involved because of a cheating complaint by a partner in a dating relationship. </p>
<p>There’s also something abhorrent to me about a dating partner’s complaining to their partner’s parent. Seems immature and inappropriate.</p>
<p>In addition, no matter how much a parent thinks they know about their kids’ romantic relationships, the parents do not know the whole story.</p>
<p>In my case, I learned almost 34 years later that my ex boyfriend had been cheating on me throughout our relationship. I learned this when I met at a conference the person who was his hometown girlfriend then, someone whom I had thought was just one of his friends. Her name is unusual, and I recognized it on her namebadge, and introduced myself to her by saying that I was the girlfriend of one of her close friends from high school. She explained to me – in telling detail – that she was his real girlfriend. </p>
<p>That wasn’t as much of a surprise to me as it could have been because about 10 years ago, I learned that when my relationship ended with the guy whom my mom thought so highly of, my friends actually were delighted because he’d been such a narcissistic jerk to me.</p>
<p>So, while the relationship ended in a way that could have been better, it was for the best. I also evolved into a person who made much better choices in men, and have been faithful in my marriage of more than 30 years.</p>
<p>Did my mother’s intervention help? No, all it did was make me angry at her and hurt our relationship. The lessons that I learned were things that I needed to do on my own. If I had been ready for her help, I would have asked for it.</p>