In 'By Jesus,' two siblings, bound by blood and faith, find themselves entangled in a web of forbidden desire. In the confines of their home, they succumb to their carnal urges, their bodies aching for release. The brother, with a raging hard-on, struggles to maintain control as his sister, a vision of innocence, teases him mercilessly. Their taboo dance ends in a passionate embrace, their bodies intertwined, their cries of ecstasy echoing through the empty house.