Teen gets a birthday massage from stepdad, but he's not the one enjoying it

The scene opens with a young woman celebrating her birthday with her stepfather. She's feeling relaxed and pampered as he massages her back, but it's clear that he's not the one enjoying the massage. The young woman moans and writhes in pleasure, clearly enjoying the sensation of his hands on her skin. The stepfather seems a little uncomfortable, but he continues to massage her, clearly trying to please her. As the massage progresses, the tension in the room builds, and the young woman's moans become more intense. Finally, she can't hold back any longer, and she arches her back in ecstasy. The stepdad looks on, clearly uncomfortably, but he doesn't intervene. The scene ends with the young woman collapsing in exhaustion, satisfied and happy with her birthday massage.