AITAH for leaving my wife after she got pregnant by a revenge affair?

[u/[deleted]]

[u/yourgirlangela]

ESH

You should have split as soon as YOU cheated if not before. The relationship is obviously unstable and unhealthy if one is cheating and the other cheats as a form of revenge. You two do need to divorce from the sound of things. This is all around a crappy situation

[u/[deleted] → u/yourgirlangela]

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[u/nigel_pow → u/[deleted]]

Can she even track the guy down?

[u/kainp12 → u/nigel_pow]

depending on the state it might not matter. A child born /conceived during the marriage is the husband unless the other guy steps up.