How did you catch your Significant Other cheating on you?

My wife's best friend moved back to our city after a 3 year stint working within the cosmetology field in London. One month of her friend being back and i was already being driven crazy from her being over to our house every other day. Her friend had no job and was basically freeloading off of anyone that would offer her a couch to surf on and a free meal while she was in "transition". As time went on things between my wife and i grew tense because i noticed small changes in her behavior and her overall approach to me since her friend returned. She was giving her friend money and lying about the reason/what it was for, she gave her my spare ipad without consulting with me, and just putting her first and whatever hardships would arise in her life. Her friend eventually got a job at a studio salon and made friends rather quickly and begin to pull my wife into every outing with her coworkers/clients. My wife started coming home later (sometimes not until the morning), lying, becoming more on edge, distant, and immensely acting out of character. I would confront her about our waning chemistry and sudden tension. She would swear it was nothing and that i was being uptight and judgemental because of her friends past. And albeit i was trying to be understanding, i still didn't buy any of it and kept a watchful eye on things. As the outings became frequent and her actions more suspicious, i put my foot down one evening and confronted them both while they were having one of their many movie nights over takeout and wine. I was tired of being neglected/used while watching her relive her college years within our marriage. My wife pauses the movie and stares me as if I'm out of line as her friend makes this "I'll go" production as my wife stops her and tells me to grow up as they both take their exit for the night. My wife stays gone for two days. She returns home and doesn't say a word. She looks spent and anxious. I storm over to her and demand answers as to what's happening between us and where on earth did this sudden change come from. She calmly asks me to get out of her way and makes her way upstairs. I am livid and unraveling mentally. She heads to our room and starts packing a bag as I'm in the doorway. I ask again what is going on. She won't answer. I ask again with the panic in my voice growing more dire and she finally tells me that she has somethings to think about. I won't continue into greater detail as it's a lot so I'll spare you and shorten it up. Basically her best friend reintroduced her to coke and had a negative influence on her. Her best friend brought a guy around my wife that was a friend of her boyfriend that also works in the same industry as my wife's best friend. Mystery guy gets a job offer on the west coast and invites my wife's best friend to come along to be his assistant. Best friend convinces my wife to go with them. Wife ghosts me, turns her cell phone off, deletes me from facebook, and divorce papers show up weeks later.

/r/AskReddit Thread