What Made a Difference

What if the summer leading into 4th year was a little different? What would this change going forward? Would having someone that cares make him a better student? Would Sirius turn him into a prankster or a fighter? And what about his friends would they not like these changes? Ron and Dumbledore bash. Minor Molly and some Hermione. Pairings HP/DG SB/RL HG/VK