Is AUTHOR wrong in the post ? POST : So I have been with this guy for 4 years now. Needless to say he is a total narcissist sociopath. Besides all the other dumb shit, there's one part that bothers me more than anything else. He has kept a "friend" of his hidden from me our entire relationship. He knew her before meeting me, but has always sweared up and down she is nothing more than a friend. She is a 40 some year old doctor about an hour an a half away from us. Long story short, he has countless times went to her house, including Christmas Day two years in a row of our relationship. One year even hand refinished an entire bedroom set for her for a Christmas present. Has many of times went there behind my back lying to do "only work on her house to pay back debts". (He owns a construction company thanks to her buying him a $20k Dodge Ram, cell phone plans, and giving him several credit cards to personally use on anything). Basically gives me some bullsh!+ about why he always goes there and basically justifies it in his mind so me being upset is almost pointless unless I want to fight a war I'm going to lose. Also have found texts back and forth saying "baby, honey, I love you, etc.". 

So leap forward to where my question comes into play. The latest scheme I came across was a few months ago when he dropped me off at a job we had (I'm the lead painter at his company since I cant work elsewhere). He said he was going to work for some guy off Craigslist about 40 minutes away that day. He calls me a few hours later saying his car died over where he was working. Me not having my car that day couldn't go get him. He said he would have to find a way and call me later. Ends up having his mom go pick him up later in the day and they come get me. Afterwards, his story didn't sound legit about where the car was (apparently some dude he just met off CL to work for was so gracious to pay to have his car towed to his house nearby and keep it there until my boyfriend could come get it). I knew he was lying as he will not leave my side unless he goes to her house. 
In the past I had many of times opened up to his mom when I needed someone to listen to me or hear my side of a story, and she always reassured me he doesn't want the other woman or she would side with me claiming to not understand his ways but always reassured me that she would "never lie to any of his girlfriend's or cover up for him". This time, however I was damn sure he was at her house yet again but I began to grow suspicious of his mom. I asked her first where he was at when she had to go pick him up; see how close their stories matched. Hers was a bit off from where he claimed to be (she said he was on the highway in our County and he said he was going for a drink on break in the next County over where he was "working"). 
So as habit goes, he goes from seeing her a few days to disappearing out of her for a few months before continuing his bs with her. After the day his car broke down he stopped obviously going to see her and there were no traces of her being in his life at the moment (he tends to drop her periodically after sucking her financially dry). Having known his mom has talked to this woman before, I felt this overwhelming need to look at her phone as his phone was really messed up (being able to receive calls or texts) and I knew this other woman wouldn't be able to contact him so she was probably upset trying to figure out what was happening. 
Anyways, I ended up looking through his mom's texts on her phone. I found what I truly didn't expect: She had actually contacted the other woman in the first place via text! She was apologizing for her son's phone as it was broken and he couldn't reach anyone. Also how he truly wanted her and wants to "work on his relationship with her". The other woman went on saying how much she truly loved him and how was an amazing and kindhearted man but she couldn't deal with the back and forth he did to her over the last 4 years. So much more I took screenshots of it all. It left me speechless and shaking for over 30 minutes. I had to act like all was fine as her and I were out at the store. 
    I went hunting for the truth and would never have believed his mom was the one trying to make it work between them! I live with them both and leaves me with no way out!

So, AITA for searching through his mother's phone in search of her lies? 

