My girlfriend is making me mess with my wife

I am married but have been in a pretty steady relationship with another woman. She is insanely hot and I can't control myself when I'm with her. She has this sexual power over me and lately has been making me mess with my wife while we are having sex. When I'm inside of her I can't think for myself. Lately her thing is making me call my wife while I am inside her. Sometimes she wants me to try to have a normal conversation while she fucks me like crazy which is so hard to do and I have to keep muting the phone. Sometimes she makes me have phone sex with my wife while i am having actual sex with her. She puts the phone on speaker and actually does whatever my wife says she is doing. I feel horrible about it afterwords but during all I can think is how hot she is and how dangerous and sexy what she makes me do is. I know it is wrong but I can't stop her. She is so fucking good I would do anything.