GF went nuclear and emailed wife details + pics

here's the email my gf sent to my wife... she also included about 6 pics of us together! what should i do? what would you do to her (gf)?

"Hi hun. I was in [town] visiting xxx from aug x - aug y. He asked me to come to the Park w u guys on Sunday so I could see [your son] on the rides..but dont worry i didn't i stayed in a different part of the park until u guys were done. we went to the [beach] on Sunday night and came back on Wednesday. We stayed in a really nice place in [the beach]. he showed me the house u guys almost brought and also his clients golf course, which was a race track once... So cool! we also went to the beach of couse and it was so nice. He proposed to me on the beach and promised that he filed for divorce from u..but I don't think he has anymore...he said that he didn't want to go thru a lawyer bc it would be to expensive and he needs the money for his business that u invested in. Can u tell me what's going on w u guys? He also said u guys don't sleep together since January either but I don't believe him anymore. We saw eachother the day after ur anniversary in may and he said u went to dinner and that's all. I don't believe him anymore. He also called me from the movie theater this weekend from the concession stand bc u made him leave his phone at phone.I just don't want to be played anymore. I don't know what he wants and I think he's telling us different things."