A man plans a hot-spring trip around his girlfriend’s family memorial, only for her adult younger-sister role-player to come along. Expecting another sexless vacation, he is stunned when the sister begins tempting him, insisting that stroking him by hand does not count as cheating. Unlike his girlfriend, she loves sex and finds every excuse to give him handjobs and make him cum. Soon they are having sweaty sex with his girlfriend right next door, and the sight of the pale sister’s skin flushing with arousal keeps him hard through 20 releases.