Yumi's son has been unemployed for half a year since graduating from university. Finally, he got a job, and thinking that they wouldn't be able to travel as a family anymore, they planned a family trip. The destination was of course different from the usual atmosphere, and her husband was more excited than usual, having intense sex with Yumi in the hot spring. This was accidentally seen by their son. That night, the son was too excited from seeing his parents' sex during the day to sleep. The son sneaked into his parents' room while they were sleeping, undid Yumi's clothes, and started licking her nipples. Then his hand reached downwards. Yumi noticed and tried to stop him…
