I married a glaring red flag which I ignored due to my life circumstances. Married at 24, kid via IVF at 27, 6 months later he left me for his affair partner with whom he is married to this day.
Maybe I forgot, but don't think I knew the pregnancy was via IVF. In some ways that seems to me extra difficult because it must've been a very planned out / intentional event in your marriage (as opposed to an unexpected opps where all of a sudden he's trapped)...and yet so soon afterwards he's running off with another woman. You lived it, so I don't need to tell you, but guess that just jumps out at me and makes your Ex's actions even worse in my mind than before, if that's possible.
Me:39 Ex-W:37 M:7 T: 9 S:6 D:3 BD/IHS/Confirm EA/PA: Feb '20 OM1 affair ends: May '20 W/OM2 & moves out: June-July '20 W files for D: Jul20 OM2 confirmed: 9/2020 Divorced: May '21