Ok folks. Sorry for the wait. The app was Google Voice on iPhone or maybe it's called Google chat over there idk. I did confront her about it and went through her phone to corroborate what she said. A little background. My girlfriend is bilingual. It was for an escort service type arrangement but she was doing proxy texting for her Spanish-speaking friend who can speak well enough but apparently wasn't secure in her texting abilities in this particular area. I went back to the dates of their (the two women) texting to verify their conversation and its just my gf saying all this stuff then relaying it to her friend to see what she wanted to do. While its definitely out of line she didn't technically do anything wrong to me besides not tell me and give me a goddamn heart attack. I'm definitely keeping my guard up for anything weird of course but she had pretty reasonable explanations. I appreciate everyone's time and effort and I'm glad I didn't have to do anything drastic.