Complex sentence: As all the kids are leaving Hayley and David share a gorgeous first kiss with each other (on the lips) and Mr. Mertle decides to not build a new fence because he's tired of kids thinking he is a mean old man.
Split into simpler sentences: As all the kids are leaving Hayley and David share a gorgeous first kiss with each other (on the lips). And Mr. Mertle decides to not build a new fence because he's tired of kids thinking he is a mean old man.