Complex sentence: Thump is satisfied that Teardrop will not cause any problems and that he understands that whatever happened between the Milton clan and Jessup was business, and lets Teardrop take Ree and be on their way.
Split into simpler sentences: Thump is satisfied that Teardrop will not cause any problems and that he understands that whatever happened between the Milton clan and Jessup was business. Thump lets Teardrop take Ree and be on their way.