my wife lately has shown a decreased interest in sex. we only have it like twice a month now. however, she masturbates nearly 4-5 times a week. when i try to ask her about it (bc it turns me on) she lies and claims she never does. when we actually DO have sex, she is crazy into it and wild. what can i do to get her away from masturbating so much? what is causing this? married women...help!