(Episodes 1&2. I edited out the annoying logos that interrupt the action.
Vika is a woman quite attached to the church, and she does not have impure thoughts, and when she does, she prays to get them out of her head. While praying with her stepson, he tells her that she suffers from strong erections. Upon reviewing the problem, she realizes that the boy has a cock as a stallion. She saw her stepson's big cock, and she wanted it! She sees it as her mission from God to help him and keep him on the righteous path.