As much as I hate the Quartering, Ralph never had any intention to show up. A month or two ago he agreed to go on the show while highly intoxicated and only because he is an internet tough guy, probably regretted it immediately the next day since it's an actual IRL show, a show that wouldn't have had special considerations, wouldn't have held back superchats, would have probably asked some questions that he can't answer, he knew that it didn't go so well for Fuentes, that Murphy had already made an ass of himself on it and gone viral, that they have a relatively large audience, etc.
He couldn't just cancel it right away though, so he waited until the last minute, if the baby hadn't been born it would have been because of the wedding, or the pregnancy, if not then for some other reason.
He would have claimed that he was trying to reschedule but didn't have time to travel down to Dallas right now, maybe in a few months, "next time" he's in Dallas or whatever and eventually the whole thing would have been forgotten.