What the woman finally looked down at was her own handbag, open on the floor between her feet, and the passport, boarding pass, and hotel voucher that had slid halfway out of it and were sitting in a spreading pool of red wine from the glass she had knocked with her elbow while snapping at my grandmother. Grandma had noticed it the moment it happened and had spent two full minutes trying to warn her, politely, three times, while the woman told her to leave her alone. By the time she looked, the boarding pass was soaked through and the passport’s corner was staining. That was the wink. My grandmother, eighty-four years old and squeezed into a third of a seat, had tried harder to save that woman’s documents than the woman had ever tried to be decent, and the woman had refused to listen right up until it cost her.

It got worse for her on landing. A soaked passport is a flagged passport, and she spent an extra hour at the connection desk while my grandmother and I walked straight through. But the part I actually remember is not the wine.

The flight attendant had watched the whole thing, the armrest, the spreading, the line about people her age not traveling. When we reached cruising altitude she came back, quietly, and moved my grandmother to an empty seat in the row ahead of me, aisle across, so we could see each other. Then she brought Grandma a small bottle of sparkling wine and a warm cookie and said, loud enough for the window-seat woman to hear, that it was the airline’s pleasure to have her aboard on her first flight.

My grandmother saw the ocean two hours later. She stood at the edge of the water in her cardigan and her good shoes and did not say anything for a long time, and then she said it was bigger than she thought, which is the truest thing anyone has ever said about the ocean.

We went back every day of that trip. She collected shells in a plastic cup. She got her feet wet exactly once and declared it too cold and did it again anyway.

The rude woman I never saw again after the connection desk, and I have stopped thinking about her, which is the best revenge there is.

My grandmother spent her whole life being small and quiet and easy for people to overlook, the kind of woman a stranger decides shouldn’t be traveling. She was tiny, and she had arthritis, and she was kinder in that seat than the person crushing her deserved. Being underestimated is not a weakness. It is only other people failing to look. Grandma saw the wine before it was a problem, saw the woman’s cruelty for exactly what it was, and saw the ocean at eighty-four with her whole heart. She was never too old to travel. She was simply, finally, going somewhere she had always deserved to be seen.