In the dimly lit room, Dam and Thu, bound by blood and taboo, succumb to their weekly ritual. Thu, on his knees, worships Dam's cock, sucking and licking, eager to taste his brother's seed. Dam, throbbing, grabs Thu's head, fucking his mouth till Thu gags. They switch, Thu bends over, Dam slams in, fucking Thu rough, their bodies slapping together. They cum together, Dam pulling out, painting Thu's ass with his load.