My Friends and I Violated My Friend's Mother Over and Over Right in Front of Him Aya Kitagawa (2011)

Aya Kitagawa plays the role of a mother who gets violated by her son's friends in front of him. She's taken advantage of by these men, engaging in acts that lead to a gangbang scenario. The central kink involves non-consensual and coercive sex, emphasizing the taboo nature of such interactions within a familial setting.