Complex sentence: When George learns about Jerry's decision, George admits his irritation with their "baby talk" romantic behavior to Jerry, who claims to have acted facetiously with Sheila at the soup stand and vows to redeem himself.
Split into simpler sentences: When George learns about Jerry's decision, George admits his annoyance with their "baby talk" romantic behavior to Jerry. Jerry claims to have behaved facetiously with Sheila at the soup stand and vows to redeem himself.