Is it permissible to think about other women (e.g. by thought, by seeing pictures of women, thinking of other’s intercourse) during intercourse with own wife?

Answered according to Hanafi Fiqh by

بسم الله الرحمن الرحيم

(Fatwa: 1097/714/L=9/1434)

It is not lawful to think about other women while having intercourse with one’s wife.
والأقرب لقواعد مذهبنا عدم الحل ، لأن تصور تلك الأجنبية بين يديه يطؤها فيه تصوير مباشرة المعصية على هيئتها فهو نظير مسألة الشرب (شامى: 9/535)

Allah knows Best!

Darul Ifta,
Darul Uloom Deoband