Had Sex with His Wife and His Older Stepsister Together

The elder stepsister was very sad due to her divorce from her husband. One day when she went to her younger stepsister's house, she told her younger stepsister to share your husband with me. The younger stepsister was shocked at first, but later with the condition that "I will give you my husband only once," the younger stepsister shared her husband to the elder stepsister.