He talks to his ex about OUR relationship

So I just found out that my boyfriend of about a year is talking to his ex-wife about OUR relationship. First of all, she applied for the divorce so why would he be asking her about relationship advice in the first place? Her fiance lives out of state so she really has no room to give advice on a relationship. I get they have kids together but why does that give him the right to talk about me to her behind my back? Why would he confide to her about our relationship? I feel so betrayed! What do I do?
He talks to his ex about OUR relationship
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