Approaching Wives during the Nights of Ramdan is permissible.

Narrated Al-Bara:

When the order of compulsory fasting of Ramadan was revealed, the people did not have sexual relations with their wives for the whole month of Ramadan, but some men cheated themselves (by violating that restriction). So Allah revealed:– “Allah is aware that you were deceiving yourselves but He accepted your repentance and for gave you..” (3.187)

حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ إِسْرَائِيلَ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ، وَحَدَّثَنَا أَحْمَدُ بْنُ عُثْمَانَ، حَدَّثَنَا شُرَيْحُ بْنُ مَسْلَمَةَ، قَالَ حَدَّثَنِي إِبْرَاهِيمُ بْنُ يُوسُفَ، عَنْ أَبِيهِ، عَنْ أَبِي إِسْحَاقَ، قَالَ سَمِعْتُ الْبَرَاءَ ـ رضى الله عنه ـ‏.‏ لَمَّا نَزَلَ صَوْمُ رَمَضَانَ كَانُوا لاَ يَقْرَبُونَ النِّسَاءَ رَمَضَانَ كُلَّهُ، وَكَانَ رِجَالٌ يَخُونُونَ أَنْفُسَهُمْ، فَأَنْزَلَ اللَّهُ ‏{‏عَلِمَ اللَّهُ أَنَّكُمْ كُنْتُمْ تَخْتَانُونَ أَنْفُسَكُمْ فَتَابَ عَلَيْكُمْ وَعَفَا عَنْكُمْ‏}‏‏.‏

Narrated `Aisha:(At times) in Ramadan the Prophet used to take a bath in the morning not because of a wet dream and would continue his fast.

حَدَّثَنَا أَحْمَدُ بْنُ صَالِحٍ، حَدَّثَنَا ابْنُ وَهْبٍ، حَدَّثَنَا يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، وَأَبِي، بَكْرٍ قَالَتْ عَائِشَةُ ـ رضى الله عنها ـ كَانَ النَّبِيُّ صلى الله عليه وسلم يُدْرِكُهُ الْفَجْرُ ‏{‏جُنُبًا‏}‏ فِي رَمَضَانَ، مِنْ غَيْرِ حُلُمٍ فَيَغْتَسِلُ وَيَصُومُ‏.‏

‘A’isha, the wife of the Apostle of Allah (may peace be upon him), said:

The dawn broke upon the Messenger of Allah (may peace be upon him) during the Ramadan in a state of junub not because of sexual dream (but on account of intercourse) and he washed himself and observed fast.

وَحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، وَأَبِي، بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ أَنَّ عَائِشَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ قَدْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُدْرِكُهُ الْفَجْرُ فِي رَمَضَانَ وَهُوَ جُنُبٌ مِنْ غَيْرِ حُلُمٍ فَيَغْتَسِلُ وَيَصُومُ ‏.‏

Yahya related to me from Malik from Abdullah ibn Abd ar-Rahman ibn Mamar al-Ansari from Abu Yunus, the mawla of A’isha, from A’isha that she overheard a man standing at the door saying to the Messenger of Allah, may Allah bless him and grant him peace, “Messenger of Allah, I get up in the morning junub, in a state of major ritual impurity, and want to fast,” and the Messenger of Allah, may Allah bless him and grant him peace, said, “I too get up in the morning junub and want to fast, so I do ghusl and fast.” The man said to him, “You are not the same as us. Allah has forgiven you all your wrong actions that have gone before and those that have come after.” The Messenger of Allah, may Allah bless him and grant him peace, got angry and said, “By Allah, I hope that I am the most fearful of you with respect to Allah and the most knowledgeable of you in how I have taqwa.”

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ مَعْمَرٍ الأَنْصَارِيِّ، عَنْ أَبِي يُونُسَ، مَوْلَى عَائِشَةَ عَنْ عَائِشَةَ، أَنَّ رَجُلاً، قَالَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم وَهُوَ وَاقِفٌ عَلَى الْبَابِ وَأَنَا أَسْمَعُ يَا رَسُولَ اللَّهِ إِنِّي أُصْبِحُ جُنُبًا وَأَنَا أُرِيدُ الصِّيَامَ ‏.‏ فَقَالَ صلى الله عليه وسلم ‏”‏ وَأَنَا أُصْبِحُ جُنُبًا وَأَنَا أُرِيدُ الصِّيَامَ فَأَغْتَسِلُ وَأَصُومُ ‏”‏ ‏.‏ فَقَالَ لَهُ الرَّجُلُ يَا رَسُولَ اللَّهِ إِنَّكَ لَسْتَ مِثْلَنَا قَدْ غَفَرَ اللَّهُ لَكَ مَا تَقَدَّمَ مِنْ ذَنْبِكَ وَمَا تَأَخَّرَ ‏.‏ فَغَضِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَقَالَ ‏”‏ وَاللَّهِ إِنِّي لأَرْجُو أَنْ أَكُونَ أَخْشَاكُمْ لِلَّهِ وَأَعْلَمَكُمْ بِمَا أَتَّقِي ‏”‏ ‏.‏

Yahya related to me from Malik from Zayd ibn Aslam from Ata ibn Yasar that a certain man kissed his wife while he was fasting in Ramadan. This made him very anxious, and so he sent his wife to the Prophet, may Allah bless him and grant him peace, to ask him about that for him. She went in and saw Umm Salama, the wife of the Prophet, may Allah bless him and grant him peace, and mentioned the matter to her, and Umm Salama told her that the Messenger of Allah, may Allah bless him and grant him peace, used to kiss while he was fasting. So she went back and told her husband that, but it only made him find fault all the more and he said, “We are not like the Messenger of Allah, may Allah bless him and grant him peace. Allah makes permissible for the Messenger of Allah, may Allah bless him and grant him peace, whatever He wishes.”His wife then went back to Umm Salama and found the Messenger of Allah, may Allah bless him and grant him peace, with her. The Messenger of Allah, may Allah bless him and grant him peace, said, “What’s the matter with this woman?”, and Umm Salama told him. The Messenger of Allah, may Allah bless him and grant him peace, said, “Didn’t you tell her that I do that myself?” and she said, “I told her, and she went to her husband and told him, but it only made him find fault all the more and say, ‘We are not like the Messenger of Allah, may Allah bless him and grant him peace. Allah makes permissible for His Messenger, may Allah bless him and grant him peace, whatever He wishes.’ ” The Messenger of Allah, may Allah bless him and grant him peace, got angry and said, “By Allah, I am the one with the most taqwa of Allah of you all, and of you all the one who best knows His limits.”

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، أَنَّ رَجُلاً، قَبَّلَ امْرَأَتَهُ وَهُوَ صَائِمٌ فِي رَمَضَانَ فَوَجَدَ مِنْ ذَلِكَ وَجْدًا شَدِيدًا فَأَرْسَلَ امْرَأَتَهُ تَسْأَلُ لَهُ عَنْ ذَلِكَ فَدَخَلَتْ عَلَى أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم فَذَكَرَتْ ذَلِكَ لَهَا فَأَخْبَرَتْهَا أُمُّ سَلَمَةَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم يُقَبِّلُ وَهُوَ صَائِمٌ فَرَجَعَتْ فَأَخْبَرَتْ زَوْجَهَا بِذَلِكَ فَزَادَهُ ذَلِكَ شَرًّا وَقَالَ لَسْنَا مِثْلَ رَسُولِ اللَّهِ صلى الله عليه وسلم اللَّهُ يُحِلُّ لِرَسُولِ اللَّهِ صلى الله عليه وسلم مَا شَاءَ ‏.‏ ثُمَّ رَجَعَتِ امْرَأَتُهُ إِلَى أُمِّ سَلَمَةَ فَوَجَدَتْ عِنْدَهَا رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏”‏ مَا لِهَذِهِ الْمَرْأَةِ ‏”‏ ‏.‏ فَأَخْبَرَتْهُ أُمُّ سَلَمَةَ فَقَالَ رَسُولُ اللَّهِ صلى الله عليوسلم ‏”‏ أَلاَّ أَخْبَرْتِيهَا أَنِّي أَفْعَلُ ذَلِكَ ‏”‏ ‏.‏ فَقَالَتْ قَدْ أَخْبَرْتُهَا فَذَهَبَتْ إِلَى زَوْجِهَا فَأَخْبَرَتْهُ فَزَادَهُ ذَلِكَ شَرًّا وَقَالَ لَسْنَا مِثْلَ رَسُولِ اللَّهِ صلى الله عليه وسلم اللَّهُ يُحِلُّ لِرَسُولِهِ صلى الله عليه وسلم مَا شَاءَ ‏.‏ فَغَضِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَقَالَ ‏”‏ وَاللَّهِ إِنِّي لأَتْقَاكُمْ لِلَّهِ وَأَعْلَمُكُمْ بِحُدُودِهِ ‏”‏ ‏