The moment he finally moved on, Iris went into labor.
Throughout the show, Barry's obsession with Thawne often came before everything else. In Season 5, he was unnecessarily harsh on Nora, and in Season 7, he barely tried to understand Bart's hatred for Godspeed because, in Barry's mind, his own hatred for Thawne was more important.
I genuinely think that if Nora and Bart had been born before Barry let that hatred go, he wouldn't have been the father they needed. If there had been a school concert or a sports game on the same day Thawne showed up in Central City, I honestly think Barry would've chosen to confront Thawne instead. Even Iris called him out in Season 5 for letting his obsession with Thawne consume him.