<human>: Hi Reddit, I have a problem. My mom has been married to a fantastic man for the majority of my life. Without him, she would have probably forgotten to feed me or something equally bad. He has taught me everything I know and I wouldn't be the same person without him. He cleans the house, he cooks, he brings home the money and he leaves my mom with basically no responsibility and has raised my little sister and I single handedly.

My scumbag of a mother has taken all of this help and freedom for granted. And this isn't the first time.

About two years ago she began going out with 'friends' till the wee hours of the morning. She said she was going to Walmart or the grocery store and wouldn't be back for five or six hours. My dad brushed it off but I became suspicious. I read the text messages she was constantly sending to someone named 'Linda' and learned that this person was actually a middle aged man with a daughter and ex wife of his own. The messages got progressively more and more descriptive and more and more pairs of frilly thongs my dad had never seen turned up in our house. I took pictures of these incriminating messages and my dad eventually called her on it. She denied it, eventually apologized for it profusely and swore not to do it again. She said the only reason she did it in the first place was because she 'wasn't happy'. My dad didn't divorce her because he didn't want to put my little sister through a move and divorce and all of that messy stuff. Which was all well and good, I suppose.

But then a few days ago my dad told me that he had caught her talking to another man (he thought) but had no proof. Once more, I nosed through her messages and found out that she was receiving messages from someone with things like 'Thinking of you' and 'you're always on my mind.' I have the guy's number and would love to help my dad catch her in the act so her sorry ass can be thrown out once and for all... but I don't know how to take the number and lack of name and come up with an address or anything identifying. 

So basically,

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My mom is cheating on my dad - who has supported her for almost 20 years - for the second time and I want to find out the guy's name and address to help my dad catch her in the act.