If you read her last thread from a month ago the boyfriend wanted to move in with her and her husband. That would have made things what a month into their relationship at the latest. That doesn't scream potential bunny boiler to any one else. That and professions of deep and undying love early on in a relationship.
I am sorry this man met the OP as a blind date set up by the husband with the idea of a partner swap. The BF dumps his girlfriend and shows up anyway. Says he never wanted an open relationship but his exgf forced him. I am sorry all that info from a month ago should have been huge red flag.
40 yo straight female
Married in the eyes of the government to Butch since 2001...
Murf my monogamous second husband has been with me since May of 2012.
In a V relationship with an average 60/40 split of time. Only due to Murf's and Butch's crappy work schedules.