Question Summary:
Foreplay or intercourse?

Question Detail:

Salam
My question is
it is obligatory for wife to come to her husband when he requests her for intimacy
BUT is it obligatory for her to be intimate with him and allow him foreplay or the only obligation is for intercourse? 

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Fulfilment in intercourse between the spouses is one of the core objectives of a marriage which is ideally achieved through mutual co-operation. The foreplay before intercourse serves to bring about that mutual co-operation for intercourse. 
And Allah Ta’āla Knows Best
Huzaifah Deedat
Student Darul Iftaa
Lusaka, Zambia 
Checked and Approved by,
Mufti Ebrahim Desai.
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صحيح البخاري-دار طوق النجاة (4/ 116)
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنِ الأَعْمَشِ، عَنْ أَبِي حَازِمٍ، عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ، قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «إِذَا دَعَا الرَّجُلُ امْرَأَتَهُ إِلَى فِرَاشِهِ فَأَبَتْ فَبَاتَ غَضْبَانَ عَلَيْهَا لَعَنَتْهَا المَلاَئِكَةُ حَتَّى تُصْبِحَ