"Namaz behayaii aur buri baaton se rokti hai" "Namaz farz hai"Namaz is one of the 5 pillars of islam, If you are muslim and you are failing to do farz you can do anything. I am not saying that a person who doesn't read namaaz is a sinner but if your life is based on religion and you are not following its "FARAIZ" whats the point left in your life.
Namaaz is a mandatory thing it cannot be left but if your spouse is careless namazi its OK you can always guide him/her.