Am i wrong ?

So I met a couple through my boyfriend . Lately they been having their issues . She tells me her secrets & he comes to us all bummed out Everytime saying he's done with her .. now I've told him because of the secrets I know that she is treating him like a fool but he knows that & knows what she be up too... I don't spill her beans at all . I hit her up today to say hi & she gets into it with me about telling her man everything I know , she never told me what exactly "I told him" but being the truthful person I am I said no I didn't & told her I only said she was disrespectful to him (she leaves & hangs out with dudes in front of his face everyday !! ) & I told him if he had already left her why did he come back to her , to stop complaining about her knowing he loves her & if he can't stay away then he knows what he's gonna be putting up with that's his choice & problem.. so she feels that i have lost her trust but the thing is I'm protective of my friends & they both are my friends but I defend him more but because what she does is wrong & he makes me feel bad, so I speak my mind & tell them both how I feel . So idk where the attitude came from idk why she cares when on her birthday she told me she wanted to leave him but didn't know how to & last time we hung out she showed me a convo with another guy she's in love with talking all this smack about her man & her not defending him .. I didn't even tell her man any of that stuff cause it's personal & he's not stupid & she knows that so idk why she blames me.. after the argument I told her I'm done being friends with them cause they put me in between something that doesn't even cross my mind .. am I wrong for this?