The son-in-law has been worried about his mother-in-law, Azusa, who lives far away, so he plans a hot spring trip and wants to spend as much time as possible with her. - Both his wife and mother-in-law were happy about their first family trip in a while, and the son-in-law was smiling as he looked at his mother-in-law's attractive body. - When we arrived at the inn, my mother-in-law went to take a bath. - A son-in-law sneaks a peek at his mother-in-law changing clothes because his wife has an urgent work call. - The son-in-law is excited by his mother-in-law's body, which is more erotic than he imagined, and plans to do it again. - At dinner, in front of the array of treats, he offers his wife a drink. - Yes, I'm going to get my wife drunk. - The strategy worked, and he crept closer to his mother-in-law, covered her mouth when she said no, and continued to caress her. - The son-in-law thrusts his length into Azusa's gradually moistening crotch. - Azusa also feels waves of pleasure over and over again as she does something she hasn't done in a long time. - When her son-in-law's spirit was released into the hot pot, Azusa reached her climax as well.