Question Summary:
Will the wudu break if the husband and wife hug and kiss each other?

Question Detail:

If the husband and wife hug and kiss in the state of wudu, will the wudu break or can we offer the namaz without making new wudu?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful. 
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
There are three types of fluids that are discharged from a male’s private part besides urine:
1.      Mani – Sperm: A white thick fluid which emits at the time of ejaculation.
2.      Mazi – Pre-coital fluid: A clear thin fluid which emits due to sexual arousement.
3.      Wadi – Liquid that precedes urine.
 
Usually, when a husband and wife take pleasure from one another i.e. hugging, kissing etc. without having intercourse, mazi is discharged.[1]  This will nullify the wudu. In this case, one must perform his/her wudu again before offering the Salāh. [2]  If the undergarment is soiled with mazi, it will have to be washed as mazi is impure (najis).
However, if nothing is discharged from the private parts, there is no need to repeat the wudu if one is already in the state of wudu.
And Allah Ta’āla Knows Best
Mawlana Abdul Hannan Nizami,
Student Darul Iftaa
USA 
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net