Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Adultery in a dream is betrayal and theft. Whoever sees himself commit adultery is stealing or betraying a trust.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Adultery indicates seeking the unlawful. Whoever sees himself commit adultery with a known woman will receive unlawful good from her.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Adultery is interpreted as loss. Whoever sees himself commit adultery will lose in his trade.