(sorry, english is not my first language, please pardon weired grammar, strange idioms and wrong usage of words)
A little backstory before I start to vent:
My wife and I are married for three years now. Before that, we were a couple for another 2 years. In general, we have a very harmonic relationship, are romantic, a good team etc.
Shortly after getting married we bought a house together and planned on having a baby. After a while, we learned that she has a condition, which made it very unlikely to become pregnant. We both were very sad but as a team decided that we can get over this. We even started the process of adopting a kid. It is very hard and unlikely in the country we both live in, so we droped our hopes on a baby about a year after that and decided to have a good life with just the two of us, lots of traveling, getting on with our carrers etc.
In October/November last year however it worked somehow and my wife got pregnant. Maybe the people telling you "it will happen right after you gave up hope" were right all along. Since my wife works in an industry, where pregnant women shouldn't work, she was given paid leave til birth (yes, this is a thing were we live).
And this is were the rock started to roll downhill: Around christmas, she told me that she wants to go on a vaction to the US (we're from europe) in February to visit an old friend and his wife. We both already booked a vacation to scotland in january the summer before, so I couldn't get days off to go with her. But this wasn't her plan anyway. She wanted to go there by herself, since she wanted to prove that she is able to manage that on her own. I was perfectly fine with that and even encouraged her to go. I thought for myself: Hey, thats probably the last chance for her to see those friends and have a vacation on her own.
I didn't know the friends before, but we talked on the phone for a while and skyped 1-2 times with both of them. They even offered that she can stay at their place. Great, this saved us a lot of money she would have spent on a hotel otherwise.
As she requested I helped her book the flight, a rental car etc.
The vacation in scotland was nice and we had a good time. Shortly before her trip to the US however, she started acting strangely. She switched of any alarm on her phone, bought a new case for it with a flap so you only see notifications when the flap is lifted. She never let go of her phone and took it with her anywhere. When looking back this is also were she started getting a little bit more distant (Hugs were decreasing, kisses were getting sloppier etc.). A blind fool that I was back then, I didn't thought much about that since we were also right in the middle of preparing everything for the baby, so stress levels were high.
As the day came she left for her solo-vacation, I drove her to the airport. The farewell was nice and heartfelt and I started missing her as soon as she went through the security check.
During her being away, I worked a lot, finished mostly of the baby-room and kept contact with her by skyping/facetiming and sending messages. She constantly told me she was missing me.
Yet, in the middle of her vacation she surprisingly told me she will go to a different city a two hour drive away of her hosts and take a hotel there to do some sightseeing and shopping. She justified this by saying that she cannot drive these 2 hours while being pregnant, which made totally sense for me since she additionally caught a cold. So, in the end, she spent three days in a hotel. During that time contact was sparse, only getting a few messages and 1-2 pictures.
As she came back from her trip, I picked her up from the airport again. At first everything was normal, but then I got the feeling that something was different. She became more and more distant and still only had eyes for her phone. I confronted her with that and she became angry and defensive about that. In the end she saw my point and I got a bit warmer between us, however, I noticed she secretly continued to use her phone heavily (e.g. sneeking to the bathroom, getting up in the middle of the night etc.).
In the next few weeks we got into a lot of minor fights, e.g. the dishwasher, chairs not being perfectly in place etc. Minor stuff. Trivialities.
I slowly grew suspicious about her behaviour and did something I'm not very proud of: I started spying on her phone. At first I simple took hasty photos of her lock screen, a few weeks ago I magically got access to her email account.
So thats were DDay happend: I found out that she is constantly texting/sexting and emailing another, 15 years older man since January now. On a daily basis, they send each other nudes, masturbation videos, pledge their undying love and loyalty and even make plans to spend their future together. I also got to know that they met (thats were she stayed at the hotel) and had at least oral sex. While being pregnant with my son. I was devasted. In fact I still am.
Since then I'm collecting "evidence" out of her email account. By that I constantly have to read that crap...
I also sought help with a very very close friend who - however - couldn't offer any good advice. I also posted this story on the internet. There I learned that I should take my evidence and go see a lawyer to learn about my options.
As of today, I'm still waiting for an appointment at a lawyer (not so easy here). However, it feels like I'm sitting in a roller coaster. At one day, she hugs and kisses me like before and I happily act like nothing ever happend. The next day, she lives inside her phone and sends pictures of her private parts to this old fart while I am sweating and painting the baby room next door.
Right now, I'm in autopilot going through the motions. One day, I'm very short before loosing my nerves and would like to scream it in her face that I know and how much I'm hurt. Then I feel regret since she is pregnant and carries my son in her (btw, I'm very sure it is in fact my kid). With the birthdate getting nearer and nearer, I am constantly shifting between these two emotions. This is slowly wearing me down...
So, thanks for reading. I'm glad I found this community. Feel free to ask me anything.