He didn’t just cheat. He hunted her down, love-bombed her, locked her in with a baby, then waited until she couldn’t leave easily to show who he really was.
Thats not a ‘mistake’. It’s entrapment and it’s intentional. Men like this don’t ‘lose control’. They maintain it until it’s too late for her to run.
He humiliated her with betrayal. You really think that wasn’t planned?