Bottom line she's outta line. We will on occasion run across people we've slept with in the past, shit happens, but how we handle it determines the outcome.
1. When you called whatever they were chatting about should've stopped and you should've been priority #1. 'Excuse me, MY HUSBAND is calling me' is a no brainer.
2. Him playing with your kids is a tad overboard.
3. You pushed and egged her on so when she said his sex was better... had it coming bro. Still very disrespectful.
6. She should have immediately let you know when she was on the phone with you that he was there and that there was an issue in the past, but said there is no concern about anything now. This would've clarified to both you and his attentive ears that you are the HUSBAND and that he is just a dude she used to know and nothing more.
Your wife is either naive and young, reminiscing over when they were together, or just plain stupid (no offense bro). I'm 45, my wife is 47, but I've always established a clear and definitive line in our relationship and dealings with people and ourselves. I'm not perfect and have slipped up from time to time, but my wife knows the boundaries of what I consider disrespectful. I don't blame the guy, the woman is always accountable in matters such as these because they have the power to shut down advances if any happened and define the boundaries. Her immediately passing the kids the phone without talking to you sent a clear message: you weren't the most important thing happening at the time. You might have a good woman, you might've pushed her into his bed again by blowing up, I don't know and lets just pray she values your marriage, you and what you've built together. Here are the options:
1. Calm down, forgive but don't forget, then observe her actions and most importantly her phone.
2. Explain calmly how she played your ass by passing the phone and see what she says. If she defends her actions... you're not her priority and you deserve better.
3. Hire an attorney secretly, claim she abandoned you and the kids. They'll run an add in some unimportant paper nobody reads and 30 days and roughly $2k later you're divorced and have custody.
4. Fly up there and calmly let her know in front of her mother that you'd like to meet this guy she had a day in the park with. I'm sure the look on her mothers face and the following mother/daughter conversation will embarrass her ass, but she will be mad AF at you.
5. Drop the bitch. The only permanent women in our lives are our mothers if they are worth a shit and our daughters.
Life is too short to be miserable and as men we can't let situations, or women dictate our lives. Use your head, go to the bank and get your money and safe deposit box that shit. The check is good for a year so if it's a sizeable amount the bank doesn't spaz out about large sum withdraws and you avoid the multiple $10k notifications to the government that make you look suspicious. Your wife behaved very disrespectfully, Mrs. 44 would never do some shit like that bro. She knows I'm not to be fucked with, but again I wuldn't have blown up like you did. Sometimes a smile is deadlier than it seems. Best of luck and no disrespect intended bro.