Not Consummating with a Woman
Scholars have stated that if one dreams of not consummating with a woman but having some minor contact, it might indicate that the good fortune for her household will be less than if consummation occurred. Moreover, dreaming of marrying one's mother, sister, or a close relative is interpreted as the dreamer cutting off ties of kinship and neglecting their rights, urging them to reconnect and rectify their shortcomings.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam