Here’s one interpretation below. But let me add a twist......the woman goes home sees the package, picks it up, and realizes it is one she sent to her now-divorced husband. Imagine what emotional scars were aggravated by that! And not knowing what was in it.....probably something very meaningful that has she created.....a symbol of their love? So she cries a tear and then opens the door and sees the note. A strange and powerful moment. A package holding the scars of her divorce saved someone's life? How is that possible?
One other thing to point out. In the opening scene the wings on the package are pink and they took major efforts to point that out. Pictured it several times, the driver points out it is pink, she says it a pink kinda day. In the closing scene, the colors have faded by the sun and salt water to light brown. And when she drives away in the truck the wings on the truck tailgate are light brown!