Complex sentence: Realizing that Tia has already left using her own, now better judgement, Buck decides to tie Bug up and throw him into his old car, after commiserating with Tia, he lets the boy out of the truck to apologize to Tia for his behavior.
Split into simpler sentences: Realizing that Tia has already left using her own, now better, judgement, Buck decides to tie Bug up and throw him into his old car. After commiserating with Tia, he lets the boy out of the truck to apologize to Tia for his behavior.