Regret perhaps

She was pushing the heavy glass door. It was difficult. I wanted to leave the shop as well so I leaned past her and pushed the door too. For me it was light. She held on to the door and it took her. She almost stumbled. She was out of the shop. So was I. She turned and looked at me and smiled.
“You nearly swept me off my feet,” she said.
“I’m sorry,” I said.”I didn’t mean to.”
She smiled a different smile now and walked away.
Later in the morning I saw her sitting on the river bank near where the kingfishers play. I waved but she did not wave back. Perhaps she did not see me.