Ever since Tony met Peter in civil war he developed an obsession in keeping him safe, but the boy was a magnet for trouble, and Tony tried to do is best. But the snap happen and Tony snapped inside and when he brought the boy back the instinct only grew horse. All the avengers knew about Tony paternal feelings towards Peter and knew what he was planning to do, but they did nothing if only they helped him. Or Tony kidnaps Peter to protect him and the avengers help *not starker