私の義理の両親は私の前で自慰行為をします.partパート3

The mother-in-law, whom I see again for the first time in a long time, is as bright and beautiful as ever. We were alone in our small house, so if I bent down for a moment or tried to clean up, I could see her underwear glimmering. I was thrilled to see her, but it seemed that she was actually more sexually aroused than I was, masturbating in the bathtub and changing rooms...!