Dating

I think I slept with a married man. Should I tell his wife?

I started talking to a guy I knew from school when I was a kid. I had a huge crush on him for years and I’ve had him on social media for the past 8 years. Apparently, he got married at about 18 or 19 years old with a girl he met in high school. He joined the army so he moved pretty far away for 3 years and during that time, they had a kid. They don’t have each other on social media and they don’t post each other so it seemed that he was possibly single. Earlier this year I reached out and he told me that he was single and he asked for my number. He claimed him and his child’s mother had a falling out and then his child was born. We started talking in May and his army contract finished so he moved back home. I spent a little time with him during the summer and it was great. I moved out of our home town last year but I got visit my family every now and then so last month while I was visiting, I came over to his house. He had his child for a few hours so a little bit after I got there, his child went to sleep. We ended up having sex and it was honestly the best sex of my life but he kind of rushed me out afterward because he said he was late to drop his kid off. His child’s mother started calling around the time he said he was supposed to drop the kid off. He called me an uber before I even found my underwear. The past 3 months, he’s become more distant. We don’t ever talk on the phone anymore and he doesn’t text me as much as he used to. So I did a little digging on social media and found his mom’s facebook. His child’s mother seems to spend A LOT of time with his family and it turns out that she went on a summer trip with him and his family during the summer, they all wore matching pajamas last Christmas, she went with his family to his birthday dinner in September, the three of them took pictures at a pumpkin patch a few weeks ago and during the week of Halloween they went to a haunted house together without the kid. Doesn’t it seem like they’re together?
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So in all of the pictures I’ve seen of her with him and his family, she’s never standing next to him…. Until the pictures of them at the haunted his. He had his arm around her and in the comments under the post, his grandmother called his child’s mother her daughter in law so it seems like they’re still together. I found her instagram and it turns out that her and I have a mutual friend. So should I tell his wife or should I talk to him about it first?
I think I slept with a married man. Should I tell his wife?
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