and it is only an idiotic moron who only follows the 'offical' rules, 'just because'.
I apologize for all of us "idiotic morons" who didn't plunk down $240 on the Quintessential line of books as well as whatever other books which YOU feel are essential.
Anyway, Epic Level Paladin, right? Which means he's got access to some of the most powerful magic items. Here're some thoughts:
Ring of Telekinesis - Use the violent trust ability to blast your wife and child in your direction. Try to catch the baby. Even if he hits the ground, it's only d6 damage, which at most puts him at -5. Lay on Hands next round and he's fine (Hmm. "Violent Thrust". Isn't that how the Paladin got INTO the situation in the first place? Wouldn't have happened if he hadn't had a half-elf baby. Oh, that was bad!).
Ring of Three Wishes - What Epic character WOULDN'T have this? Simply Wish your family to safety.
Bag of Tricks - The Paladin would've probably let loose a couple of animals before the penultimate fight, as they last for 10 minutes. So the Paladin could've had a couple of them ready when he confronted the Sorcerer. He could've had one go and save his wife while he went to save the baby (None of them could save the baby, as only the bat flies, and I doubt it's strong enough to carry him).
Boots of Speed - The Paladin uses them to Haste himself, usng his extra Parial Action to get his wife out, then grabs the baby.
Figurines of Wondrous Power - Same as Bag of Tricks. The Figurine critter saves one while the Paladin saves the other.
Just a couple examples I found before I got bored of the topic. There're probably a bunch more. Might be some Paladin spells out there somewhere that this Paladin might've memorized beforehand and which might be useful, too. For instance, the Paladin spell
Shackle from Van Richten's Arsenal. Leaves teh target paralyzed for a number of rounds with no saving throw. Means that the Sorcerer can't drop the baby and can't slice open my wife, as his hand can't lower the pendulum. Paladin can now save his wife and baby at his leisure, etc.