Yasuko ended up taking care of her three nephews while their parents were on a trip. She had been doting on them since they were little, and she treated them the same as ever. Of course, when it was time to sleep, they all slept together in a river formation. However, Yasuko woke up in the middle of the night and was shocked by a significant change: all three brothers had grown "huge dicks." Despite being her nephews, sexually frustrated Yasuko secretly licked one, then two, comparing their tastes. She then chose one to ride and moaned on top of it, but she didn't realize that Ichiro had seen the whole thing...
