Wa `alaykum as-Salamu wa Rahmatullahi wa Barakatuh.

 

Technically waking up at night time to make prayers is called tahajjud. It is recommended to offer prayers at any part of the night even if before going to bed. What you do with your wife is a highly rewarded act of worship.

 

Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (peace be upon him) said, “May Allah show mercy to a man who gets up during the night and performs Salat, awakens his wife to pray and if she refuses, he sprinkles water on her face (to make her get up). May Allah show mercy to a woman who gets up during the night and performs Salat, awakens her husband for the same purpose; and if he refuses, she sprinkles water on his face.” (Abu Dawud)

Allah Almighty knows best.