What conflict is the narrator facing in this excerpt from Robert Cormier’s “The Moustache”?

“Listen . . .” I began. I wanted to say: “Nana, this is Mike your grandson, not Mike your husband.”

“Sh . . . sh . . .” she whispered, placing a finger as long and cold as a candle against my lips. “Don’t say anything. I’ve waited so long for this moment. To be here. With you. I wondered what I would say if suddenly you walked in that door like other people have done. I’ve thought and thought about it. And I finally made up my mind—I’d ask you to forgive me. I was too proud to ask before.” Her fingers tried to mask her face. “But I’m not proud anymore, Mike.” That great voice quivered and then grew strong again. “I hate you to see me this way—you always said I was beautiful. I didn’t believe it. The Charity Ball when we led the grand march and you said I was the most beautiful girl there . . .”

“Nana,” I said. I couldn’t keep up the pretense any longer, adding one more burden to my load of guilt, leading her on this way, playing a pathetic game of make-believe with an old woman clinging to memories. She didn’t seem to hear me.