My gf(45yr)confessed to me(49yr) that she went to her drug dealer's house with the intention of fucking him, but claims that she didn't.

For the past two years we have been in a somewhat struggling Open relationship.. meaning that we're both partners, but we both have had our fair share of liaisons. With that said, I only get jealous or upset when I'm feeling that she's being disrespectful.

So, for the past year, I have expressed my disdain for this person numerous times, and how I don't like his blatant disrespect towards me or our relationship. And so after sometime my gf agreed, however, sometimes I would accuse her fucking him. And, so after I year of her denial, and a year of assurance that, she would never have sex with him, etc.... suddenly I get hit with this bombshell.

So I'm really kinda of shell shocked. Was she confessing that she has been fucking him, that she wants to fuck him, or whatever.

At the end of the day, however, I feel that just by her saying that she went to his house, with that intention, her purpose wasn't just a confession, it was her way of breaking up. Knowing how it would negatively impact our relationship and /or how it will affect me.

How should I proceed with our relationship? I don't know if I should feel violated, accept her apology, or consider this as more of a declarative statement that the relationship is over? It's difficult to think that someone could be this cruel.