Regardless of whether it is a marriage or a platonic friendship, communication has long been heralded as a fundamental component to any successful relationship.
Be open with your spouse. Marriage is an institution whereby you choose only one person, out of so many people that come in and out of your lives, to spend the rest of your life with. Thus, there should be no reason why you cannot be open with your spouse. No one likes to be lied to or worse, cheated on. Lies often become hard to maintain resulting in a distressing endless cycle.
A lack of communication has plagued many marriages before. If she asks you what you have been up to after a long day at work, instead of being irritated, treat is as a sign that she still cares about you. This really speaks volumes about you as a great husband!