Tā zài piāochuāng shàng fàng le zuòdiàn hé bàozhěn.
She put cushions and pillows on the bay window ledge.
Tips
culture
飘 literally means 'to float/drift' - the window 'floats' out from the wall. Chinese apartment listings market 飘窗 as a lifestyle perk; in decor photos you always see a cushioned reading nook on the ledge.