A tragedy that came to a sister who had to live with her father-in-law due to her mother's remarriage. PtoM incest from her sister's vagina to her sister's throat, with the penis inserted into her sister's vagina as it is into her sister's throat. Two people simultaneous throat boco training and continuous most crazy Deep Throating. The ending of the women who became the ones who continue to be forced to do sexual processing service every day without rest.