Answered by Shaykh Amjad Rasheed
Is it permissible for a person who intends to fast the next day to eat and drink and make love to his wife at night, after he makes the intention?
Yes, it is permissible for a person who intends to fast an obligatory or supererogatory fast the next day to eat and drink and make love to his wife at night, after having made the intention, until dawn, as our imams have stated, such as Imam al-Nawawi in the Minhaj. Ibn Hajar said in the Tuhfa, “This is because Allah Most High has permitted eating until the rise of dawn.” (3:389)
Amjad Rasheed
[Translated by Sr. Shazia Ahmad]