Megan's poem is a string of memories addressed to her younger brother, all centered on a tire swing hanging from their favorite oak. Again and again she asks, "Do you remember...?", and each time she adds a new picture: racing out on a summer evening, him begging to be pushed, his laugh spreading to everyone nearby as he swung "into the clouds."
The speaker feels deeply nostalgic and tender. She plays the older sister, the one who pushes, and she treasures the role. The repeated question works like a gentle tug, pulling both of them back to childhood. The mood is warm and sweet, but there's an ache underneath. In the last stanza the swing stops, and she tells us she will never forget his words: "Sissy, will you push me just one more time??" The poem suggests that this small, ordinary request has become precious to her, and the past tense hints that those days are over.