There has been a security flaw discovered with Google hangout where your conversation would be duplicated to other contacts. This actually happened to me earlier this morning when I was in a hangout with a couple friends, I noticed my messages we're being sent to my mother in law. Seems like Google is working on it but this is a pretty big security issue for those who may be transmitting more sensitive details over, and it got copied over to the wrong person. https://productforums.google.com/forum/#!msg/hangouts/kyPqLPpPFSU/qVIRI26tBGUJ Anyone else getting this?